Fix PR2017 and silence some bogus errors.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@49068 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Sema/SemaType.cpp b/lib/Sema/SemaType.cpp
index d4cb979..ad9d138 100644
--- a/lib/Sema/SemaType.cpp
+++ b/lib/Sema/SemaType.cpp
@@ -203,7 +203,7 @@
         DeclType.Ref.AttrList = ProcessTypeAttributes(T, AL);
       break;
     case DeclaratorChunk::Array: {
-      const DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr;
+      DeclaratorChunk::ArrayTypeInfo &ATI = DeclType.Arr;
       Expr *ArraySize = static_cast<Expr*>(ATI.NumElts);
       ArrayType::ArraySizeModifier ASM;
       if (ATI.isStar)
@@ -246,9 +246,11 @@
         Diag(ArraySize->getLocStart(), diag::err_array_size_non_int, 
              ArraySize->getType().getAsString(), ArraySize->getSourceRange());
         D.setInvalidType(true);
+        delete ArraySize;
+        ATI.NumElts = ArraySize = 0;
       }
       llvm::APSInt ConstVal(32);
-      // If no expression was provided, we consider it a VLA.
+      // If no expression was provided, we consider it an incomplete array.
       if (!ArraySize) {
         T = Context.getIncompleteArrayType(T, ASM, ATI.TypeQuals);
       } else if (!ArraySize->isIntegerConstantExpr(ConstVal, Context)) {