Copter: move RTLState to ModeRTL

ArduCopter/defines.h

@@ -106,16 +106,6 @@ enum GuidedMode {
     Guided_Angle,
 };
 
-// RTL states
-enum RTLState {
-    RTL_Starting,
-    RTL_InitialClimb,
-    RTL_ReturnHome,
-    RTL_LoiterAtHome,
-    RTL_FinalDescent,
-    RTL_Land
-};
-
 // Safe RTL states
 enum SmartRTLState {
     SmartRTL_WaitForPathCleanup,

ArduCopter/mode.h

@@ -1019,6 +1019,15 @@ public:
     // for reporting to GCS
     bool get_wp(Location &loc) override;
 
+    // RTL states
+    enum RTLState {
+        RTL_Starting,
+        RTL_InitialClimb,
+        RTL_ReturnHome,
+        RTL_LoiterAtHome,
+        RTL_FinalDescent,
+        RTL_Land
+    };
     RTLState state() { return _state; }
 
     // this should probably not be exposed

ArduCopter/mode_auto.cpp

@@ -1755,7 +1755,7 @@ bool ModeAuto::verify_loiter_to_alt()
 bool ModeAuto::verify_RTL()
 {
     return (copter.mode_rtl.state_complete() && 
-    (copter.mode_rtl.state() == RTL_FinalDescent || copter.mode_rtl.state() == RTL_Land) &&
+            (copter.mode_rtl.state() == ModeRTL::RTL_FinalDescent || copter.mode_rtl.state() == ModeRTL::RTL_Land) &&
             (motors->get_spool_state() == AP_Motors::SpoolState::GROUND_IDLE));
 }