seq: fixed a bug in pvGet/PutComplete

Must not epicsEventSignal when epicsEventTryWait returns
epicsEventWaitTimeout, since this means we have not yet been called
back by CA. This bug could lead to pvGet/PutComplete erroneously
returning TRUE even though the callback did not yet arrive.

src/seq/seq_if.c

@@ -257,7 +257,6 @@ epicsShareFunc boolean epicsShareAPI seq_pvGetComplete(SS_ID ss, VAR_ID varId)
 			ss_read_buffer(ss, ch, FALSE);
 		return TRUE;
 	case epicsEventWaitTimeout:
-		epicsEventSignal(getSem);
 		return FALSE;
 	case epicsEventWaitError:
 		ss->getReq[varId] = NULL;
@@ -540,7 +539,6 @@ epicsShareFunc boolean epicsShareAPI seq_pvPutComplete(
 			done = TRUE;
 			break;
 		case epicsEventWaitTimeout:
-			epicsEventSignal(putSem);
 			break;
 		case epicsEventWaitError:
 			ss->putReq[varId] = NULL;