HEAD errorpage.cc compile fix

[Pawel Worach]

Update this assert too now that the MemObject is gone.

   - Pawel

Index: src/errorpage.cc
===================================================================
RCS file: /squid/squid3/src/errorpage.cc,v
retrieving revision 1.192
diff -u -r1.192 errorpage.cc
--- src/errorpage.cc    6 Sep 2003 12:47:35 -0000       1.192
+++ src/errorpage.cc    6 Sep 2003 17:30:12 -0000
@@ -354,7 +354,7 @@
         * error message
         */
        assert(EBIT_TEST(entry->flags, ENTRY_ABORTED));
-        assert(mem->nclients == 0);
+        assert(entry->mem_obj->nclients == 0);
        errorStateFree(err);
        return;
    }