Copter: accept more mav-frame types

accept mav frames whether or not they have _INT appended

ArduCopter/GCS_Mavlink.cpp

@@ -1385,9 +1385,11 @@ void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
         }
 
         // check for supported coordinate frames
-        if (packet.coordinate_frame != MAV_FRAME_GLOBAL_INT &&
+        if (packet.coordinate_frame != MAV_FRAME_GLOBAL &&
+            packet.coordinate_frame != MAV_FRAME_GLOBAL_INT &&
             packet.coordinate_frame != MAV_FRAME_GLOBAL_RELATIVE_ALT && // solo shot manager incorrectly sends RELATIVE_ALT instead of RELATIVE_ALT_INT
             packet.coordinate_frame != MAV_FRAME_GLOBAL_RELATIVE_ALT_INT &&
+            packet.coordinate_frame != MAV_FRAME_GLOBAL_TERRAIN_ALT &&
             packet.coordinate_frame != MAV_FRAME_GLOBAL_TERRAIN_ALT_INT) {
             break;
         }
@@ -1421,10 +1423,12 @@ void GCS_MAVLINK_Copter::handleMessage(mavlink_message_t* msg)
                     loc.flags.relative_alt = true;
                     loc.flags.terrain_alt = false;
                     break;
+                case MAV_FRAME_GLOBAL_TERRAIN_ALT:
                 case MAV_FRAME_GLOBAL_TERRAIN_ALT_INT:
                     loc.flags.relative_alt = true;
                     loc.flags.terrain_alt = true;
                     break;
+                case MAV_FRAME_GLOBAL:
                 case MAV_FRAME_GLOBAL_INT:
                 default:
                     // Copter does not support navigation to absolute altitudes. This convert the WGS84 altitude