[gimp] plug-ins: do not segfault in file-gegl if > 1 image format omits a handler

[Michael Henning <mhenning src gnome org>]

commit 885a81fbfa30c70b9e7d4b2917734e92b61989ac
Author: Michael Henning <drawoc darkrefraction com>
Date:   Wed Jul 24 13:59:24 2013 -0400

    plug-ins: do not segfault in file-gegl if > 1 image format omits a handler

 plug-ins/common/file-gegl.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/plug-ins/common/file-gegl.c b/plug-ins/common/file-gegl.c
index c4af101..79e6a0a 100644
--- a/plug-ins/common/file-gegl.c
+++ b/plug-ins/common/file-gegl.c
@@ -196,7 +196,7 @@ run (const gchar      *name,
     {
       const FileFormat *format = &file_formats[i];
 
-      if (! strcmp (name, format->load_proc))
+      if (format->load_proc && !strcmp (name, format->load_proc))
         {
           image_ID = load_image (param[1].data.d_string, &error);
 
@@ -213,7 +213,7 @@ run (const gchar      *name,
 
           break;
         }
-      else if (! strcmp (name, format->save_proc))
+      else if (format->save_proc && !strcmp (name, format->save_proc))
         {
           GimpExportReturn export = GIMP_EXPORT_CANCEL;