[gthumb] Fix build failing without libtiff installed.

[Paolo Bacchilega <paobac src gnome org>]

commit c1dc2d867d611d471a877d56613242d220118bf2
Author: Robert Roth <robert roth off gmail com>
Date:   Tue Jan 14 16:14:57 2014 +0200

    Fix build failing without libtiff installed.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=722183

 extensions/cairo_io/gth-image-saver-tiff.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/extensions/cairo_io/gth-image-saver-tiff.c b/extensions/cairo_io/gth-image-saver-tiff.c
index d869852..c7ae2fb 100644
--- a/extensions/cairo_io/gth-image-saver-tiff.c
+++ b/extensions/cairo_io/gth-image-saver-tiff.c
@@ -529,7 +529,7 @@ gth_image_saver_tiff_save_image (GthImageSaver  *base,
        gboolean   result;
 
        pixbuf = gth_image_get_pixbuf (image);
-       pixbuf_type = get_pixbuf_type_from_mime_type (mime_type);
+       pixbuf_type = _gdk_pixbuf_get_type_from_mime_type (mime_type);
        result = gdk_pixbuf_save_to_bufferv (pixbuf,
                                             buffer,
                                             buffer_size,