Make CodeGen produce an error if we come across a non-constant initializer list that involves the GNU array-range designator extension

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@63327 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index 8a04198..35384d8 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -224,7 +224,7 @@
                            SourceLocation rbraceloc)
   : Expr(InitListExprClass, QualType()),
     LBraceLoc(lbraceloc), RBraceLoc(rbraceloc), SyntacticForm(0), 
-    UnionFieldInit(0) {
+    UnionFieldInit(0), HadArrayRangeDesignator(false) {
 
   InitExprs.insert(InitExprs.end(), initExprs, initExprs+numInits);
 }