Flush coins cache also after transaction processing

src/main.cpp

@@ -4830,6 +4830,7 @@ bool static ProcessMessage(CNode* pfrom, string strCommand, CDataStream& vRecv,
             if (nDoS > 0)
                 Misbehaving(pfrom->GetId(), nDoS);
         }
+        FlushStateToDisk(state, FLUSH_STATE_PERIODIC);
     }