[gthumb] jpeg loader: set the error if the operation was cancelled

[Paolo Bacchilega <paobac src gnome org>]

commit e50d1c3ddd1347062dcfdd33ee9a3c0e5783dfb6
Author: Paolo Bacchilega <paobac src gnome org>
Date:   Sat Sep 15 11:28:36 2012 +0200

    jpeg loader: set the error if the operation was cancelled

 extensions/cairo_io/cairo-image-surface-jpeg.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/extensions/cairo_io/cairo-image-surface-jpeg.c b/extensions/cairo_io/cairo-image-surface-jpeg.c
index 562ded5..3d685ed 100644
--- a/extensions/cairo_io/cairo-image-surface-jpeg.c
+++ b/extensions/cairo_io/cairo-image-surface-jpeg.c
@@ -532,8 +532,10 @@ _cairo_image_surface_create_from_jpeg (GInputStream  *istream,
 		jpeg_finish_decompress (&srcinfo);
 		jpeg_destroy_decompress (&srcinfo);
 	}
-	else
+	else {
 		jpeg_destroy ((j_common_ptr) &srcinfo);
+		g_set_error_literal (error, G_IO_ERROR, G_IO_ERROR_CANCELLED, "");
+	}
 
 	cairo_surface_destroy (surface);
 	g_free (in_buffer);