[gdk-pixbuf] Set up a jmp target in begin_load too

[Matthias Clasen <matthiasc src gnome org>]

commit 3645ce712e1c41a7a800585a366402776b2fe1bf
Author: Matthias Clasen <mclasen redhat com>
Date:   Wed Mar 30 02:41:46 2011 -0400

    Set up a jmp target in begin_load too
    
    This needs to be done before calling into libjpeg to catch
    errors coming out of jpeg_create_decompress. Patch by
    Craig Schlenter,
    http://bugzilla.gnome.org/show_bug.cgi?id=636138

 gdk-pixbuf/io-jpeg.c |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/gdk-pixbuf/io-jpeg.c b/gdk-pixbuf/io-jpeg.c
index c41914d..8560c94 100644
--- a/gdk-pixbuf/io-jpeg.c
+++ b/gdk-pixbuf/io-jpeg.c
@@ -662,6 +662,13 @@ gdk_pixbuf__jpeg_image_begin_load (GdkPixbufModuleSizeFunc size_func,
         context->jerr.pub.output_message = output_message_handler;
         context->jerr.error = error;
 
+        if (sigsetjmp (context->jerr.setjmp_buffer, 1)) {
+                jpeg_destroy_decompress (&context->cinfo);
+                g_free(context);
+                /* error should have been set by fatal_error_handler () */
+                return NULL;
+        }
+
 	/* create libjpeg structures */
 	jpeg_create_decompress (&context->cinfo);