[evolution-data-server] Fix some issues found by Coverity Scan, cppcheck and clang

[Milan Crha <mcrha src gnome org>]

commit 789167ec7cb16cb5f666e8425ef85c9bafccf142
Author: Milan Crha <mcrha redhat com>
Date:   Mon May 16 19:51:31 2016 +0200

    Fix some issues found by Coverity Scan, cppcheck and clang

 calendar/backends/file/e-cal-backend-file.c |    2 +-
 camel/camel-mime-filter-enriched.c          |    8 ++++++--
 camel/camel-text-index.c                    |    3 +++
 camel/providers/imapx/camel-imapx-server.c  |    1 +
 camel/providers/imapx/camel-imapx-utils.c   |    2 +-
 camel/providers/smtp/camel-smtp-transport.c |    1 +
 libedataserver/e-data-server-util.c         |    3 ++-
 7 files changed, 15 insertions(+), 5 deletions(-)
---
diff --git a/calendar/backends/file/e-cal-backend-file.c b/calendar/backends/file/e-cal-backend-file.c
index b8e0e43..ec9d4f6 100644
--- a/calendar/backends/file/e-cal-backend-file.c
+++ b/calendar/backends/file/e-cal-backend-file.c
@@ -2498,7 +2498,7 @@ e_cal_backend_file_modify_objects (ECalBackendSync *backend,
                        }
 
                        if (g_hash_table_lookup_extended (obj_data->recurrences, rid, (gpointer *) &real_rid, 
(gpointer *) &recurrence)) {
-                               if (*old_components)
+                               if (old_components)
                                        *old_components = g_slist_prepend (*old_components, 
e_cal_component_clone (recurrence));
 
                                /* remove the component from our data */
diff --git a/camel/camel-mime-filter-enriched.c b/camel/camel-mime-filter-enriched.c
index a8247b8..bb5dea0 100644
--- a/camel/camel-mime-filter-enriched.c
+++ b/camel/camel-mime-filter-enriched.c
@@ -242,8 +242,12 @@ enriched_to_html (CamelMimeFilter *mime_filter,
 
  retry:
        do {
-               while (inptr < inend && outptr < outend && !strchr (" <>&\n", *inptr))
-                       *outptr++ = *inptr++;
+               while (inptr < inend && outptr < outend && !strchr (" <>&\n", *inptr)) {
+                       *outptr = *inptr;
+
+                       outptr++;
+                       inptr++;
+               }
 
                if (outptr == outend)
                        goto backup;
diff --git a/camel/camel-text-index.c b/camel/camel-text-index.c
index 411a5c7..dbf5f8f 100644
--- a/camel/camel-text-index.c
+++ b/camel/camel-text-index.c
@@ -1679,6 +1679,9 @@ text_index_cursor_next (CamelIndexCursor *idc)
                }
 
                g_free (p->current);
+               p->current = NULL;
+               flags = 0;
+
                camel_key_table_lookup (
                        tip->name_index, p->records[p->record_index],
                        &p->current, &flags);
diff --git a/camel/providers/imapx/camel-imapx-server.c b/camel/providers/imapx/camel-imapx-server.c
index ed3ea43..ea82111 100644
--- a/camel/providers/imapx/camel-imapx-server.c
+++ b/camel/providers/imapx/camel-imapx-server.c
@@ -1164,6 +1164,7 @@ imapx_untagged_fetch (CamelIMAPXServer *is,
                                g_prefix_error (
                                        error, "%s: ",
                                        _("Error writing to cache stream"));
+                               imapx_free_fetch (finfo);
                                return FALSE;
                        }
                        g_mutex_unlock (&is->priv->stream_lock);
diff --git a/camel/providers/imapx/camel-imapx-utils.c b/camel/providers/imapx/camel-imapx-utils.c
index 9c2bbeb..0d02dd0 100644
--- a/camel/providers/imapx/camel-imapx-utils.c
+++ b/camel/providers/imapx/camel-imapx-utils.c
@@ -1029,7 +1029,7 @@ imapx_parse_body_fields (CamelIMAPXInputStream *stream,
 error:
        imapx_free_body (cinfo);
 
-       return cinfo;
+       return NULL;
 }
 
 CamelHeaderAddress *
diff --git a/camel/providers/smtp/camel-smtp-transport.c b/camel/providers/smtp/camel-smtp-transport.c
index 9a6877a..de6bc6f 100644
--- a/camel/providers/smtp/camel-smtp-transport.c
+++ b/camel/providers/smtp/camel-smtp-transport.c
@@ -754,6 +754,7 @@ smtp_transport_authenticate_sync (CamelService *service,
                        goto break_and_lose;
 
                g_free (respbuf);
+               respbuf = NULL;
 
                /* send our challenge */
                cmdbuf = g_strdup_printf ("%s\r\n", challenge);
diff --git a/libedataserver/e-data-server-util.c b/libedataserver/e-data-server-util.c
index 1eead56..60bb63d 100644
--- a/libedataserver/e-data-server-util.c
+++ b/libedataserver/e-data-server-util.c
@@ -292,7 +292,8 @@ e_util_utf8_strstrcase (const gchar *haystack,
                nuni[nlen++] = g_unichar_tolower (unival);
        }
        /* NULL means there was illegal utf-8 sequence */
-       if (!p) return NULL;
+       if (!p || !nlen)
+               return NULL;
 
        o = haystack;
        for (p = e_util_unicode_get_utf8 (o, &unival);