[gthumb] get_image_loader_func: skip the preferred format

[Paolo Bacchilega <paobac src gnome org>]

commit f471804fe6242b0de9fe91944efac3d7f7107368
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Fri Jun 28 16:37:49 2013 +0200

    get_image_loader_func: skip the preferred format
    
    it is already checked in the lines above

 gthumb/gth-main.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gthumb/gth-main.c b/gthumb/gth-main.c
index 3e7f4f5..a0bbdcf 100644
--- a/gthumb/gth-main.c
+++ b/gthumb/gth-main.c
@@ -729,6 +729,8 @@ gth_main_get_image_loader_func (const char     *mime_type,
         * format. */
 
        for (format = 0; (loader == NULL) && (format < GTH_IMAGE_N_FORMATS); format++) {
+               if (format == preferred_format)
+                       continue;
                g_free (key);
                key = g_strdup_printf ("%s-%d", mime_type, format);
                loader = g_hash_table_lookup (Main->priv->image_loaders, key);