check.ts dcheck fix

Author: craigphicks

src/compiler/checker.ts

@@ -14767,20 +14767,20 @@ export function createTypeChecker(host: TypeCheckerHost): TypeChecker {
         let result = carveoutResult(type, kind);
         if (result) return result;
         // The original logical for the non-carveout case is recorded in the block comment below, for the record.
-        //result = getSignaturesOfStructuredType(getReducedApparentType(type), kind);
+        // result = getSignaturesOfStructuredType(getReducedApparentType(type), kind);
         // if (kind === SignatureKind.Call && !length(result) && type.flags & TypeFlags.Union) {
         //     if ((type as UnionType).arrayFallbackSignatures) {
         //         return (type as UnionType).arrayFallbackSignatures!;
         //     }
         //     return (type as UnionType).arrayFallbackSignatures = result;
         // }
-        if (kind === SignatureKind.Call && /*!length(result) && */ type.flags & TypeFlags.Union) {
+        if (kind === SignatureKind.Call && type.flags & TypeFlags.Union) {
             if ((type as UnionType).arrayFallbackSignatures) {
                 return (type as UnionType).arrayFallbackSignatures!;
             }
         }
         result = getSignaturesOfStructuredType(getReducedApparentType(type), kind);
-        if (kind === SignatureKind.Call && /*!length(result) && */ type.flags & TypeFlags.Union) {
+        if (kind === SignatureKind.Call && type.flags & TypeFlags.Union) {
             (type as UnionType).arrayFallbackSignatures = result;
         }
         return result;