Copter: bugfix for starting in LOITER

Loiter's Roll-Pitch mode was not being set on start-up.

ArduCopter/ArduCopter.pde

@@ -1604,17 +1604,11 @@ bool set_roll_pitch_mode(uint8_t new_roll_pitch_mode)
         case ROLL_PITCH_AUTO:
         case ROLL_PITCH_STABLE_OF:
         case ROLL_PITCH_DRIFT:
+        case ROLL_PITCH_LOITER:
         case ROLL_PITCH_SPORT:
             roll_pitch_initialised = true;
             break;
 
-        case ROLL_PITCH_LOITER:
-            // require gps lock
-            if( ap.home_is_set ) {
-                roll_pitch_initialised = true;
-            }
-            break;
-
 #if AUTOTUNE == ENABLED
         case ROLL_PITCH_AUTOTUNE:
             // only enter autotune mode from stabilized roll-pitch mode when armed and flying