Index: libgdiplus/src/pngcodec.c
===================================================================
--- libgdiplus.orig/src/pngcodec.c	2014-08-27 18:51:11.175217773 +0100
+++ libgdiplus/src/pngcodec.c	2014-08-27 18:51:11.171217773 +0100
@@ -350,8 +350,8 @@
 
 		if (png_get_valid (png_ptr, info_ptr, PNG_INFO_tRNS))
 		{
-			png_bytep trans_alpha;
-			int num_trans;
+			png_bytep trans_alpha = 0;
+			int num_trans = 0;
 			png_color_16p trans_color;
 
 			/* Make sure transparency is respected. */