[anjuta] Fix a random crash when vim modelines are used

[Sebastien Granjoux <sgranjoux src gnome org>]

commit 228bbc54042094fe9114e0cf52eb69447216766a
Author: Sébastien Granjoux <seb sfo free fr>
Date:   Fri Nov 3 22:29:16 2017 +0100

    Fix a random crash when vim modelines are used

 libanjuta/anjuta-modeline.c |   13 ++++++-------
 1 files changed, 6 insertions(+), 7 deletions(-)
---
diff --git a/libanjuta/anjuta-modeline.c b/libanjuta/anjuta-modeline.c
index 45eb514..7694d74 100644
--- a/libanjuta/anjuta-modeline.c
+++ b/libanjuta/anjuta-modeline.c
@@ -124,7 +124,7 @@ static gboolean
 parse_vim_modeline (IndentationParams *params, const gchar *line, gint linenum)
 {
        gchar *ptr;
-       gchar *end;
+       const gchar *end;
        gchar *key;
        gchar *value;
 
@@ -149,23 +149,22 @@ parse_vim_modeline (IndentationParams *params, const gchar *line, gint linenum)
        }
        ptr += 3;
 
-       for (end = ptr;; end++)
+       for (end = ptr; *end != '\0'; end++)
        {
                if ((*end == ':') && (*(end-1) != '\\')) break;
        }
-       *end = '\0';
 
-       while (*ptr != '\0')
+       while (ptr != end)
        {
                gchar sep;
                
                while (g_ascii_isspace (*ptr)) ptr++;
-               if (*ptr == '\0') break;
+               if (ptr == end) break;
 
                /* Get key */
                key = ptr++;
                value = NULL;
-               while ((*ptr != '\0') && (*ptr != '=') && !g_ascii_isspace(*ptr)) ptr++;
+               while ((ptr != end) && (*ptr != '=') && !g_ascii_isspace(*ptr)) ptr++;
                sep = *ptr;
                *ptr = '\0';
 
@@ -173,7 +172,7 @@ parse_vim_modeline (IndentationParams *params, const gchar *line, gint linenum)
                {
                        /* Get value */
                        value = ++ptr;
-                       while ((*ptr != '\0') && !g_ascii_isspace(*ptr)) ptr++;
+                       while ((ptr != end) && !g_ascii_isspace(*ptr)) ptr++;
                        sep = *ptr;
                        *ptr = '\0';