found another place to fall through in the checker

TravCav · TravCav · commit 9861569ae977 · 2018-04-06T13:40:58.000-04:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -24629,7 +24629,6 @@ namespace ts {
                 case SyntaxKind.ConstructorType:
                 case SyntaxKind.CallSignature:
                 case SyntaxKind.ConstructSignature:
-                    return checkSignatureDeclaration(<SignatureDeclaration>node);
                 case SyntaxKind.IndexSignature:
                     return checkSignatureDeclaration(<SignatureDeclaration>node);
                 case SyntaxKind.MethodDeclaration:
