png loader: gray can have alpha

diff --git a/gdk/loaders/gdkpng.c b/gdk/loaders/gdkpng.c
index 20711210d0b9a9f1c880817bda8b86481df6fa42..c049868caf0427eb5169b5cf36989f5c7e422ed3 100644 (file)
--- a/gdk/loaders/gdkpng.c
+++ b/gdk/loaders/gdkpng.c
@@ -184,7 +184,8 @@ gdk_load_png (GBytes  *bytes,
   if (color_type == PNG_COLOR_TYPE_PALETTE)
     png_set_palette_to_rgb (png);
 
-  if (color_type == PNG_COLOR_TYPE_GRAY)
+  if (color_type == PNG_COLOR_TYPE_GRAY ||
+      color_type == PNG_COLOR_TYPE_GRAY_ALPHA)
     png_set_expand_gray_1_2_4_to_8 (png);
 
   if (png_get_valid (png, info, PNG_INFO_tRNS))