[gdk-pixbuf] gdk-pixbuf-io: treat application/gzip like text/plain

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 1f61b30a1f217fd560906d462b87a27b2b6655c8
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Apr 20 15:16:48 2015 +0300

    gdk-pixbuf-io: treat application/gzip like text/plain
    
    https://bugzilla.gnome.org/show_bug.cgi?id=648815

 gdk-pixbuf/gdk-pixbuf-io.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gdk-pixbuf/gdk-pixbuf-io.c b/gdk-pixbuf/gdk-pixbuf-io.c
index 367d45c..a805e82 100644
--- a/gdk-pixbuf/gdk-pixbuf-io.c
+++ b/gdk-pixbuf/gdk-pixbuf-io.c
@@ -893,7 +893,7 @@ _gdk_pixbuf_get_module (guchar *buffer, guint size,
         gboolean uncertain;
 
         mime_type = g_content_type_guess (NULL, buffer, size, &uncertain);
-        if ((uncertain || g_str_equal (mime_type, "text/plain")) && filename != NULL) {
+        if ((uncertain || g_str_equal (mime_type, "text/plain") || g_str_equal (mime_type, 
"application/gzip")) && filename != NULL) {
                 g_free (mime_type);
                 mime_type = g_content_type_guess (filename, buffer, size, NULL);
         }