fixed endlocation bug.

ICSharpCode.NRefactory/CSharp/Ast/PrimitiveType.cs

@@ -56,7 +56,7 @@ namespace ICSharpCode.NRefactory.CSharp
 		}
 		public override AstLocation EndLocation {
 			get {
-				return new AstLocation (Location.Line, Location.Column + Keyword != null ? Keyword.Length : 0);
+				return new AstLocation (Location.Line, Location.Column + (Keyword != null ? Keyword.Length : 0));
 			}
 		}