[devhelp] do not crash on empty search

[Frederic Peters <fpeters src gnome org>]

commit 0fd03b018876fef5ada0657ec24cb831c6e511b7
Author: FrÃdÃric PÃters <fpeters 0d be>
Date:   Tue Mar 6 14:15:36 2012 +0100

    do not crash on empty search
    
    https://bugzilla.gnome.org/show_bug.cgi?id=671397

 src/dh-keyword-model.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/dh-keyword-model.c b/src/dh-keyword-model.c
index 98a9df8..f26e724 100644
--- a/src/dh-keyword-model.c
+++ b/src/dh-keyword-model.c
@@ -362,6 +362,10 @@ dh_globbed_keywords_new (GStrv keywords)
         GList *list = NULL;
         struct _DhKeywordGlobPattern *glob_struct;
 
+        if (keywords == NULL) {
+                return NULL;
+        }
+
         for (i = 0; keywords[i] != NULL; i++) {
                 glob_struct = g_slice_new (struct _DhKeywordGlobPattern);
                 glob_struct->keyword = keywords[i];