minor: Use Vector2.Zero constant and only set in condition branch where it was missing in TryParseConsole2DVector(). xbuild still compiles.

OpenSim/Framework/Console/ConsoleUtil.cs

@@ -284,10 +284,11 @@ namespace OpenSim.Framework.Console
             // We don't use Vector2.TryParse() for now because for some reason it expects an input with 3 components
             // rather than 2.
             string cookedVector = CookVector(rawConsoleVector, 2, blankComponentFunc);
-            vector = new Vector2(0.0f);
 
             if (cookedVector == null)
             {
+                vector = Vector2.Zero;
+
                 return false;
             }
             else