Moved the error check from parser to checker & updated baselines

src/compiler/checker.ts

@@ -6639,6 +6639,10 @@ module ts {
                 var ambient = isInAmbientContext(node);
 
                 forEach(node.members, member => {
+				    // todo: remove first check here when isNumericName gets fixed
+					if(!(member.name.text === "") && isNumericName(member.name.text)) {
+						error(member.name, Diagnostics.An_enum_member_cannot_have_a_numeric_name);
+					}
                     var initializer = member.initializer;
                     if (initializer) {
                         autoValue = getConstantValueForExpression(initializer);

src/compiler/parser.ts

@@ -3673,12 +3673,6 @@ module ts {
                 var node = <EnumMember>createNode(SyntaxKind.EnumMember);
                 var errorCountBeforeEnumMember = file.syntacticErrors.length;
                 node.name = parsePropertyName();
-                
-                // number("") returns 0 so we have to special case it
-                if(node.name.text !== "" && !isNaN(Number(node.name.text))) {
-                    grammarErrorOnNode(node.name, Diagnostics.An_enum_member_cannot_have_a_numeric_name);
-                }
-
                 node.initializer = parseInitializer(/*inParameter*/ false);
 
                 if (inAmbientContext) {