Get rid of some warnings in timer initialization.

git-svn-id: svn://svn.code.sf.net/p/irrlicht/code/trunk@5294 dfc29bdd-3216-0410-991c-e03cc46cb475

source/Irrlicht/os.cpp

@@ -253,7 +253,8 @@ namespace os
 		timeinfo = localtime(&rawtime);
 
 		// init with all 0 to indicate error
-		ITimer::RealTimeDate date={0};
+		ITimer::RealTimeDate date;
+		memset(&date, 0, sizeof(date));
 		// at least Windows returns NULL on some illegal dates
 		if (timeinfo)
 		{