pidgin-twitter fix

diff -Naur pidgin-twitter-0.9.2.1/icon.c pidgin-twitter-0.9.2.1-new/icon.c
--- pidgin-twitter-0.9.2.1/icon.c   2011-05-12 18:08:01.000000000 +0300
+++ pidgin-twitter-0.9.2.1-new/icon.c   2012-04-26 16:24:10.032924662 +0300
@@ -280,7 +280,7 @@
     }

     if(data && data->pixbuf) {
-        gdk_pixbuf_unref(data->pixbuf);
+        g_object_unref(data->pixbuf);
         data->pixbuf = NULL;
     }

@@ -327,7 +327,7 @@
         size = DEFAULT_ICON_SIZE;

     dest = gdk_pixbuf_scale_simple(src, size, size, GDK_INTERP_HYPER);
-    gdk_pixbuf_unref(src);
+    g_object_unref(src);

     return dest;
 }