[gtk+] GtkIconTheme: Make suffix_from_name NULL-safe

[Matthias Clasen <matthiasc src gnome org>]

commit 162990394387e744122273cc6d473b45b133e158
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Sep 5 13:15:14 2014 -0400

    GtkIconTheme: Make suffix_from_name NULL-safe
    
    This can happen sometimes with GFileIcons that are
    not representable as a local path. Better not to crash
    in this case.

 gtk/gtkicontheme.c |   25 +++++++++++++------------
 1 files changed, 13 insertions(+), 12 deletions(-)
---
diff --git a/gtk/gtkicontheme.c b/gtk/gtkicontheme.c
index f4fc82f..8ac6dd6 100644
--- a/gtk/gtkicontheme.c
+++ b/gtk/gtkicontheme.c
@@ -2840,18 +2840,19 @@ string_from_suffix (IconSuffix suffix)
 static IconSuffix
 suffix_from_name (const gchar *name)
 {
-  IconSuffix retval;
-
-  if (g_str_has_suffix (name, ".symbolic.png"))
-    retval = ICON_SUFFIX_SYMBOLIC_PNG;
-  else if (g_str_has_suffix (name, ".png"))
-    retval = ICON_SUFFIX_PNG;
-  else if (g_str_has_suffix (name, ".svg"))
-    retval = ICON_SUFFIX_SVG;
-  else if (g_str_has_suffix (name, ".xpm"))
-    retval = ICON_SUFFIX_XPM;
-  else
-    retval = ICON_SUFFIX_NONE;
+  IconSuffix retval = ICON_SUFFIX_NONE;
+
+  if (name != NULL)
+    {
+      if (g_str_has_suffix (name, ".symbolic.png"))
+        retval = ICON_SUFFIX_SYMBOLIC_PNG;
+      else if (g_str_has_suffix (name, ".png"))
+        retval = ICON_SUFFIX_PNG;
+      else if (g_str_has_suffix (name, ".svg"))
+        retval = ICON_SUFFIX_SVG;
+      else if (g_str_has_suffix (name, ".xpm"))
+        retval = ICON_SUFFIX_XPM;
+    }
 
   return retval;
 }