Clear new bitmaps to transparent black on creation of gtk bitmaps.

svn path=/trunk/netsurf/; revision=3439

1 files changed, 5 insertions, 0 deletions

diff --git a/gtk/gtk_bitmap.c b/gtk/gtk_bitmap.c
index f48d480f1..4701a7b5d 100644
--- a/gtk/gtk_bitmap.c
+++ b/gtk/gtk_bitmap.c
@@ -49,6 +49,11 @@ struct bitmap *bitmap_create(int width, int height, unsigned int state)
         
 	bmp->primary = gdk_pixbuf_new(GDK_COLORSPACE_RGB, true, 8,
                                       width, height);
+
+	/* fill the pixbuf in with 100% transparent black, as the memory
+	 * won't have been cleared.
+	 */
+	gdk_pixbuf_fill(bmp->primary, 0);
         bmp->pretile_x = bmp->pretile_y = bmp->pretile_xy = NULL;
 	return bmp;
 }