File libproxy-0.4.6-gcc6.patch of Package mingw32-libproxy

--- libproxy-0.4.6/libproxy/modules/wpad_dns_alias.cpp	2010-09-01 22:23:34.000000000 +0200
+++ libproxy-0.4.6/libproxy/modules/wpad_dns_alias.cpp	2016-05-25 17:50:14.268733399 +0200
@@ -27,7 +27,7 @@
 	void rewind()              { lasturl = NULL; lastpac = NULL; }
 
 	url* next(char** pac) {
-		if (lasturl) return false;
+		if (lasturl) return NULL;
 
 		lasturl = new url("http://wpad/wpad.dat");
 		lastpac = *pac = lasturl->get_pac();