Handle converting member pointers to bool.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@89692 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 7c80f04..34790d2 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -556,6 +556,8 @@
     return "FloatingToIntegral";
   case CastExpr::CK_FloatingCast:
     return "FloatingCast";
+  case CastExpr::CK_MemberPointerToBoolean:
+    return "MemberPointerToBoolean";
   }
 
   assert(0 && "Unhandled cast kind!");