Fix presubmit style error in parser.cc

BUG=
R=mvstanton@chromium.org

Review URL: https://codereview.chromium.org/315003007

git-svn-id: https://v8.googlecode.com/svn/branches/bleeding_edge@21686 ce2b1a6d-e550-0410-aec6-3dcde31c8c00

src/parser.cc

@@ -2287,11 +2287,13 @@ Block* Parser::ParseVariableDeclarations(
 
 static bool ContainsLabel(ZoneStringList* labels, Handle<String> label) {
   ASSERT(!label.is_null());
-  if (labels != NULL)
-    for (int i = labels->length(); i-- > 0; )
-      if (labels->at(i).is_identical_to(label))
+  if (labels != NULL) {
+    for (int i = labels->length(); i-- > 0; ) {
+      if (labels->at(i).is_identical_to(label)) {
         return true;
-
+      }
+    }
+  }
   return false;
 }