fix error of 'rolling output' if there are no warnings

as a consequence this results in an exception because the cursor is positioned beyond the window's size

VectoConsole/Program.cs

@@ -328,6 +328,8 @@ Examples:
 				Console.ForegroundColor = ConsoleColor.Yellow;
 				Console.WriteLine(@"Warnings: {0,5}", WarningMessages.Count);
 				Console.ResetColor();
+			} else {
+				Console.WriteLine("");
 			}
 
 			_numLines += 2;