Fix <rdar://problem/5716940> rewriter generates invalid C code when no selector found.

llvm-svn: 48479
diff --git a/clang/Driver/RewriteTest.cpp b/clang/Driver/RewriteTest.cpp
index 4f27ab9..239fa2d 100644
--- a/clang/Driver/RewriteTest.cpp
+++ b/clang/Driver/RewriteTest.cpp
@@ -2074,7 +2074,8 @@
   // Now do the "normal" pointer to function cast.
   QualType castType = Context->getFunctionType(returnType, 
     &ArgTypes[0], ArgTypes.size(),
-    Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : false);
+    // If we don't have a method decl, force a variadic cast.
+    Exp->getMethodDecl() ? Exp->getMethodDecl()->isVariadic() : true);
   castType = Context->getPointerType(castType);
   cast = new CastExpr(castType, cast, SourceLocation());