Bug 565748 - nsTArray.h:905: warning: unused variable ‘elem’, r=roc

xpcom/glue/nsTArray.h

@@ -902,7 +902,6 @@ class nsTArray : public nsTArray_base {
       if (!Length()) {
         return;
       }
-      elem_type *elem = Elements();
       index_type index = (Length() - 1) / 2;
       do {
         SiftDown(index, comp);