Add localtime_r function which is not existing in Windows

Common/FileUtil.cpp

@@ -70,6 +70,16 @@ static inline int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **res
 }
 #endif
 
+// No thread safe
+#ifdef _WIN32
+inline struct tm* localtime_r (const time_t *clock, struct tm *result) {
+	if (!clock || !result) return NULL;
+	memcpy(result,localtime(clock),sizeof(*result));
+	return result;
+}
+#endif
+
+
 // This namespace has various generic functions related to files and paths.
 // The code still needs a ton of cleanup.
 // REMEMBER: strdup considered harmful!