Provide suggested no-arg calls for overloaded member functions missing calls

Reviewed by Richard Smith.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@184612 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaChecking.cpp b/lib/Sema/SemaChecking.cpp
index 87fe763..96d8742 100644
--- a/lib/Sema/SemaChecking.cpp
+++ b/lib/Sema/SemaChecking.cpp
@@ -4871,7 +4871,7 @@
             << FixItHint::CreateInsertion(E->getExprLoc(), "&");
           QualType ReturnType;
           UnresolvedSet<4> NonTemplateOverloads;
-          S.isExprCallable(*E, ReturnType, NonTemplateOverloads);
+          S.tryExprAsCall(*E, ReturnType, NonTemplateOverloads);
           if (!ReturnType.isNull() 
               && ReturnType->isSpecificBuiltinType(BuiltinType::Bool))
             S.Diag(E->getExprLoc(), diag::note_function_to_bool_call)