Added default return code of 0.

--HG--
extra : convert_revision : svn%3A39bc706e-5318-0410-9160-8a85361fbb7c/trunk%402499

tools/builder/Main.cs

@@ -43,9 +43,11 @@ namespace builder
 			} 
 			catch (System.Exception e) 
 			{
-				Console.WriteLine("Build failed: " + e.Message);
+				Console.WriteLine("Build failed, exception: " + e.Message);
                 Environment.Exit(1);
 			}
+
+            Environment.Exit(0);
 		}
 	}
 }