Update the bloom state on the real object, not the temporary one.

This resulted in just passing all transactions to filtered wallets
which worked surprisingly well, except where it didn't.

src/main.cpp

@@ -3699,7 +3699,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv)
             LOCK(pfrom->cs_filter);
             delete pfrom->pfilter;
             pfrom->pfilter = new CBloomFilter(filter);
-            filter.UpdateEmptyFull();
+            pfrom->pfilter->UpdateEmptyFull();
         }
         pfrom->fRelayTxes = true;
     }