File windows-fixes.patch of Package mingw64-gwenhywfar5

--- a/src/gwenhywfarapi.h	2017-05-23 07:38:51.911107998 +0000
+++ b/src/gwenhywfarapi.h	2017-05-23 07:38:57.319127655 +0000
@@ -84,7 +84,7 @@
 #endif
 
 #if GWENHYWFAR_SYS_IS_WINDOWS
-# define GWENHYWFAR_CB __stdcall
+# define GWENHYWFAR_CB
 #else
 # define GWENHYWFAR_CB
 #endif