Level select cheat fixes

src/d_netcmd.c

@@ -1925,6 +1925,7 @@ static void Command_Map_f(void)
 	newresetplayers = ! COM_CheckParm("-noresetplayers");
 
 	prevent_cheat = !( usedCheats ) && !( option_force || cv_debug );
+	set_cheated = false;
 
 	if (!( netgame || multiplayer ))
 	{

src/m_cond.c

@@ -528,7 +528,7 @@ UINT8 M_CampaignWarpIsCheat(INT32 gt, INT32 mapnum, gamedata_t *data)
 	}
 
 	// It's only a cheat if you've never been there.
-	return (!(data->mapvisited[mapnum]));
+	return (!(data->mapvisited[mapnum-1]));
 }
 
 INT32 M_CountEmblems(gamedata_t *data)