Merge branch 'cb/mingw-gmtime-r'

Build fix on Windows.

* cb/mingw-gmtime-r:
  mingw: avoid fallback for {local,gm}time_r()

compat/mingw.c

@@ -1083,6 +1083,7 @@ int pipe(int filedes[2])
 	return 0;
 }
 
+#ifndef __MINGW64__
 struct tm *gmtime_r(const time_t *timep, struct tm *result)
 {
 	if (gmtime_s(result, timep) == 0)
@@ -1096,6 +1097,7 @@ struct tm *localtime_r(const time_t *timep, struct tm *result)
 		return result;
 	return NULL;
 }
+#endif
 
 char *mingw_getcwd(char *pointer, int len)
 {