smite some compiler warnings, hide those that are to stay.

Hide some makefile output too

OpenRA.Game/Game.cs

@@ -231,6 +231,7 @@ namespace OpenRA
 			return sb.ToString();
 		}
 
+		#pragma warning disable 0472, 0162
 		internal static void DumpSyncReport(int frame)
 		{
 			var f = syncReports.FirstOrDefault(a => a.First == frame);