Fix incorrect CJS showing in missed approach alarm ACK button in towe…

…r unit when scratchpad string is occupied

MissedApproach/MissedApproachAlarm.cpp

@@ -476,11 +476,11 @@ void MissedApproachAlarm::OnFlightPlanControllerAssignedDataUpdate(CFlightPlan F
 			}
 		}
 
-		// Trigger alarm (APP)
+		// Clear Scratchpad
 		scratchPadString.erase(0, strlen("MISAP_"));
 		controllerData.SetScratchPadString(scratchPadString.c_str());
 
-		// Don't add to vector unless runway is selected and active
+		// Don't Trigger alarm (APP) unless runway is selected and active
 		if (find(activeMAPPRunways.begin(), activeMAPPRunways.end(), data.GetArrivalRwy()) == activeMAPPRunways.end()) return;
 		missedAcftData.push_back(FlightPlan.GetCallsign());
 		missedAcftData.push_back(data.GetDestination());

MissedApproach/MissedApproachPlugin.cpp

@@ -52,11 +52,10 @@ void MissedApproachPlugin::ackMissedApproach(const char* callsign) {
 	data = fpl.GetFlightPlanData();
 	controllerData = fpl.GetControllerAssignedData();
 
-	string buf = controllerData.GetScratchPadString();
-	buf.append("MISAP-ACK_");
+	string buf = "MISAP-ACK_";
 	buf.append(myself.GetPositionId());
+	buf.append(controllerData.GetScratchPadString());
 	controllerData.SetScratchPadString(buf.c_str());
-	//couldn't find it, handle error
 }
 
 void MissedApproachPlugin::resetMissedApproach(const char* callsign) {
@@ -118,5 +117,6 @@ bool MissedApproachPlugin::matchArrivalAirport(const char* arrivalArpt) {
 }
 
 string MissedApproachPlugin::checkForAck(string scratchPadString) {
-	return scratchPadString.substr(10, 2);
+	auto it = scratchPadString.find("MISAP-ACK_");
+	return scratchPadString.substr(it + 10, 2);
 }