error

#include 
 #include 

 new normalTrace[33], lastTrace[33], cvEnabled, weapon, dummy;

 // plugin load
 public plugin_init()
 {
    register_plugin("No Walls","0.13","Avalanche");

    register_cvar("nowalls_version","0.13",FCVAR_SERVER);
    cvEnabled = register_cvar("nowalls_enabled","1");

    register_event("ResetHUD","event_resethud","b");
    register_clcmd("fullupdate","cmd_fullupdate");

    register_forward(FM_TraceLine,"fw_traceline");
    register_forward(FM_PlayerPostThink,"fw_playerpostthink");
 }

 // reset normal trace id on join or leave
 public client_connect(id)
 {
    normalTrace[id] = 0;
 }

 public client_disconnect(id)
 {
    normalTrace[id] = 0;
 }

 // player spawns, and some other such things
 public event_resethud(id)
 {
    lastTrace[id] = 0;
 }

 // block forced resethud call
 public cmd_fullupdate(id)
 {
    return PLUGIN_HANDLED;
 }

 // traceline hook, meat and bones of the entire plugin
 public fw_traceline(Float:vecStart[3],Float:vecEnd[3],ignoreM,id,ptr) // pentToSkip == id, for clarity
 {
    if(!is_user_connected(id))
        return FMRES_IGNORED;

    // grab normal trace
    if(!normalTrace[id])
    {
        normalTrace[id] = ptr;
        return FMRES_IGNORED;
    }

    // ignore normal trace
    else if(ptr == normalTrace[id])
        return FMRES_IGNORED;

    // no functionality
    if(!get_pcvar_num(cvEnabled))
        return FMRES_IGNORED;

    // not a player entity, or player is dead
    if(!is_user_alive(id))
        return FMRES_IGNORED;

    // not shooting anything
    if(!(pev(id,pev_button) & IN_ATTACK))
        return FMRES_IGNORED;

    weapon = get_user_weapon(id,dummy,dummy);

    // using a shotgun, expect multiple tracelines
    if(weapon == CSW_M3 || weapon == CSW_XM1014)
        return FMRES_IGNORED;

    // this is a second traceline, for shooting through walls
    if(ptr == lastTrace[id])
    {
        // values sure to throw off any traceline
        set_tr(TR_vecEndPos,Float:{4096.0,4096.0,4096.0});
        set_tr(TR_AllSolid,1);
        set_tr(TR_pHit,0);
        set_tr(TR_iHitgroup,0);
        set_tr(TR_flFraction,1.0);

        return FMRES_SUPERCEDE;
    }

    // remeber traceline index for next time
    lastTrace[id] = ptr;

    return FMRES_IGNORED;
 }

 // finished client calculations, reset our traceline index
 public fw_playerpostthink(id)
 {
    lastTrace[id] = 0;
 }