[glib] gstrfuncs: Add missing preconditions to g_str_match_string()

[Philip Withnall <pwithnall src gnome org>]

commit 11297fd183b460abfad861cb94f9371fde487ef2
Author: Philip Withnall <philip withnall collabora co uk>
Date:   Thu Nov 28 20:39:56 2013 +0000

    gstrfuncs: Add missing preconditions to g_str_match_string()
    
    https://bugzilla.gnome.org/show_bug.cgi?id=113075

 glib/gstrfuncs.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/glib/gstrfuncs.c b/glib/gstrfuncs.c
index 0c50dfb..1292266 100644
--- a/glib/gstrfuncs.c
+++ b/glib/gstrfuncs.c
@@ -2944,6 +2944,8 @@ g_str_tokenize_and_fold (const gchar   *string,
 {
   gchar **result;
 
+  g_return_val_if_fail (string != NULL, NULL);
+
   if (ascii_alternates && g_str_is_ascii (string))
     {
       *ascii_alternates = g_new0 (gchar *, 0 + 1);
@@ -3037,6 +3039,9 @@ g_str_match_string (const gchar *search_term,
   gboolean matched;
   gint i, j;
 
+  g_return_val_if_fail (search_term != NULL, FALSE);
+  g_return_val_if_fail (potential_hit != NULL, FALSE);
+
   term_tokens = g_str_tokenize_and_fold (search_term, NULL, NULL);
   hit_tokens = g_str_tokenize_and_fold (potential_hit, NULL, accept_alternates ? &alternates : NULL);