Reset group from repairGroup if a repair event was prevented

Such as telling the droid to do something else while it was going to repair.

src/droid.cpp

@@ -86,6 +86,8 @@ static std::priority_queue<int> recycled_experience[MAX_PLAYERS];
 // the structure that was last hit
 DROID	*psLastDroidHit;
 
+void droidWasFullyRepairedBase(DROID *psDroid);
+
 //determines the best IMD to draw for the droid - A TEMP MEASURE!
 static void groupConsoleInformOfSelection(UDWORD groupNumber);
 static void groupConsoleInformOfCreation(UDWORD groupNumber);
@@ -802,6 +804,15 @@ void droidUpdate(DROID *psDroid)
 		return; // rest below is irrelevant if dead
 	}
 
+	// Restore group from repairGroup if the droid gets interrupted while retreating.
+	if (psDroid->repairGroup != UBYTE_MAX &&
+		psDroid->order.type != DORDER_RTR &&
+		psDroid->order.type != DORDER_RTR_SPECIFIED &&
+		psDroid->order.type != DORDER_RTB)
+	{
+		droidWasFullyRepairedBase(psDroid);
+	}
+
 	// ai update droid
 	aiUpdateDroid(psDroid);