Merge pull request #423 from TheBlueMatt/mapalreadyaskedforfix

Actually use mapAlreadyAskedFor.

src/main.cpp

@@ -2570,6 +2570,7 @@ bool SendMessages(CNode* pto, bool fSendTrickle)
                     vGetData.clear();
                 }
             }
+            mapAlreadyAskedFor[inv] = nNow;
             pto->mapAskFor.erase(pto->mapAskFor.begin());
         }
         if (!vGetData.empty())