Bug 572296. Fix logic error when adjusting the position to show the context menu at for a context menu key press. r=enndeakin

layout/base/nsPresShell.cpp

@@ -6998,11 +6998,12 @@ PresShell::GetCurrentItemAndPositionForElement(nsIDOMElement *aCurrentEl,
     // don't check menulists as the selected item will be inside a popup.
     nsCOMPtr<nsIDOMXULMenuListElement> menulist = do_QueryInterface(aCurrentEl);
     if (!menulist) {
-      checkLineHeight = PR_FALSE;
       nsCOMPtr<nsIDOMXULSelectControlElement> select =
         do_QueryInterface(aCurrentEl);
-      if (select)
+      if (select) {
+        checkLineHeight = PR_FALSE;
         select->GetSelectedItem(getter_AddRefs(item));
+      }
     }
   }