Fix Parser::isCXXConditionDeclaration to properly resolve declarations.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@57111 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Parse/ParseTentative.cpp b/lib/Parse/ParseTentative.cpp
index 95512a6..1209b57 100644
--- a/lib/Parse/ParseTentative.cpp
+++ b/lib/Parse/ParseTentative.cpp
@@ -259,11 +259,9 @@
   // declarator
   TPR = TryParseDeclarator(false/*mayBeAbstract*/);
 
-  PA.Revert();
-
   // In case of an error, let the declaration parsing code handle it.
   if (TPR == TPR_error)
-    return true;
+    TPR = TPR_true;
 
   if (TPR == TPR_ambiguous) {
     // '='
@@ -275,6 +273,8 @@
       TPR = TPR_false;
   }
 
+  PA.Revert();
+
   assert(TPR == TPR_true || TPR == TPR_false);
   return TPR == TPR_true;
 }