PR34161: support evaluation of 'void()' expressions in C++14 onwards.

llvm-svn: 311115
diff --git a/clang/lib/AST/ExprConstant.cpp b/clang/lib/AST/ExprConstant.cpp
index 041bede..be4b3af 100644
--- a/clang/lib/AST/ExprConstant.cpp
+++ b/clang/lib/AST/ExprConstant.cpp
@@ -9787,6 +9787,8 @@
 
   bool Success(const APValue &V, const Expr *e) { return true; }
 
+  bool ZeroInitialization(const Expr *E) { return true; }
+
   bool VisitCastExpr(const CastExpr *E) {
     switch (E->getCastKind()) {
     default: