Fix trycameramove crash on dedicated server

src/p_map.c

@@ -2502,6 +2502,9 @@ boolean P_TryCameraMove(fixed_t x, fixed_t y, camera_t *thiscam)
 
 	floatok = false;
 
+	if (dedicated) // this crashes so don't even try it
+		return false;
+
 	if (twodlevel
 		|| (thiscam == &camera && players[displayplayer].mo && (players[displayplayer].mo->flags2 & MF2_TWOD))
 		|| (thiscam == &camera2 && players[secondarydisplayplayer].mo && (players[secondarydisplayplayer].mo->flags2 & MF2_TWOD)))