Fix fully armed VTOLs attached to sensors sitting down near former ta…

…rgets

In the case of moving a Strike sensor around, the VTOL(s) would still fly towards the previously spotted target.

If the sensor still isn't watching anything yet then those VTOLs would opt to sit next to the target, likely to their demise.

src/order.cpp

@@ -1097,7 +1097,6 @@ void orderUpdateDroid(DROID *psDroid)
 				}
 			}
 			else if (isVtolDroid(psDroid) &&
-			        !vtolFull(psDroid) &&
 			         (psDroid->action != DACTION_NONE) &&
 			         (psDroid->action != DACTION_FIRESUPPORT))
 			{