Fix segfault when calling P_RemoveMobj from MobjCollide hook

src/p_map.c

@@ -4005,7 +4005,8 @@ void P_BounceMove(mobj_t *mo)
 	slidemo = mo;
 	hitcount = 0;
 
-retry:
+	do
+	{
 		if (++hitcount == 3)
 			goto bounceback; // don't loop forever
 
@@ -4082,8 +4083,12 @@ bounceback:
 			newy = FixedMul(mmomy, bestslidefrac);
 
 			if (!P_TryMove(mo, mo->x + newx, mo->y + newy, true))
+			{
+				if (P_MobjWasRemoved(mo))
+					return;
 				goto bounceback;
 			}
+		}
 
 		// Now continue along the wall.
 		// First calculate remainder.
@@ -4127,9 +4132,8 @@ bounceback:
 			mo->player->cmomx = tmxmove;
 			mo->player->cmomy = tmymove;
 		}
-
-	if (!P_TryMove(mo, mo->x + tmxmove, mo->y + tmymove, true))
-		goto retry;
+	}
+	while (!P_TryMove(mo, mo->x + tmxmove, mo->y + tmymove, true) && !P_MobjWasRemoved(mo));
 }
 
 //