[XoX]

I would do a var

Код:

new InDM[MAX_PLAYERS];
new rand = random(sizeof(RandomSpawnsDM));

Код:

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(!strcmp(cmdtext, "/dm", true))
    {
        InDM[playerid]=1;
        SetPlayerPos(playerid, ..., ..., ....)
        SendClientMessage(playerid,COLOR_GREEN,"Du hast die Deathmatch Zone betreten!");
        return 1;
    }
}

Код:

public OnPlayerSpawn(playerid)
{
    if (InDM[playerid] > 0)
    {
    SetPlayerPos(playerid, ..., ..., ....)
    return 1;
    }
}

Not tested. Sry if there're any errors my head is not working at morning.