Safe not Smart small change

src/FirmwarePlugin/APM/ArduCopterFirmwarePlugin.cc

@@ -41,7 +41,7 @@ APMCopterMode::APMCopterMode(uint32_t mode, bool settable) :
     enumToString.insert(THROW,     "Throw");
     enumToString.insert(AVOID_ADSB,"Avoid ADSB");
     enumToString.insert(GUIDED_NOGPS,"Guided No GPS");
-    enumToString.insert(SMART_RTL,"Smart RTL");
+    enumToString.insert(SAFE_RTL,"Safe RTL");
 
 
     setEnumToStringMapping(enumToString);
@@ -68,7 +68,7 @@ ArduCopterFirmwarePlugin::ArduCopterFirmwarePlugin(void)
     supportedFlightModes << APMCopterMode(APMCopterMode::THROW     ,true);
     supportedFlightModes << APMCopterMode(APMCopterMode::AVOID_ADSB,true);
     supportedFlightModes << APMCopterMode(APMCopterMode::GUIDED_NOGPS,true);
-    supportedFlightModes << APMCopterMode(APMCopterMode::SMART_RTL,true);
+    supportedFlightModes << APMCopterMode(APMCopterMode::SAFE_RTL,true);