Simplify parseTypeReference

Create the node first, rather than creating it later and setting its pos to another node that was created first.

Author: Andy Hanson

src/compiler/parser.ts

@@ -2054,9 +2054,8 @@ namespace ts {
         // TYPES
 
         function parseTypeReference(): TypeReferenceNode {
-            const typeName = parseEntityName(/*allowReservedWords*/ false, Diagnostics.Type_expected);
-            const node = <TypeReferenceNode>createNode(SyntaxKind.TypeReference, typeName.pos);
-            node.typeName = typeName;
+            const node = <TypeReferenceNode>createNode(SyntaxKind.TypeReference);
+            node.typeName = parseEntityName(/*allowReservedWords*/ false, Diagnostics.Type_expected);
             if (!scanner.hasPrecedingLineBreak() && token() === SyntaxKind.LessThanToken) {
                 node.typeArguments = parseBracketedList(ParsingContext.TypeArguments, parseType, SyntaxKind.LessThanToken, SyntaxKind.GreaterThanToken);
             }