what a wonderful place to use the null coalescing operator

svn path=/trunk/mcs/; revision=92949

mcs/class/System.Core/System.Linq.Expressions/ExpressionPrinter.cs

@@ -216,8 +216,7 @@ namespace System.Linq.Expressions {
 
 		protected override void VisitParameter (ParameterExpression parameter)
 		{
-			var name = parameter.Name;
-			Print (name == null ? "<param>" : name);
+			Print (parameter.Name ?? "<param>");
 		}
 
 		protected override void VisitMemberAccess (MemberExpression member)