cairo-util: Add png loader and image type sniffing
diff --git a/clients/tablet-shell.c b/clients/tablet-shell.c
index 6f1f231..1a647e8 100644
--- a/clients/tablet-shell.c
+++ b/clients/tablet-shell.c
@@ -88,7 +88,7 @@
 
 	cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
 	if (path)
-		image = load_jpeg(path);
+		image = load_image(path);
 	if (image) {
 		pattern = cairo_pattern_create_for_surface(image);
 		sx = (double) cairo_image_surface_get_width(image) /