fix: clear checkingList when component is reseted

[nidi21]

if the server is restarted using gmx, the checkingList will remain intact and won't be cleared. this results in the entries becoming invalid after the restart, causing the server to crash but only when the size of checkingList is greater than 1.

cc: @zookyy for discovering the bug

#define MIXED_SPELLINGS

#include <open.mp>

main() {}

#define XYZ(%0) %0[0], %0[1], %0[2]


new Float: g_HunterFields[][4] = {
    { -1915.0, -2458.0, -1371.0, -1802.0 },
    { -697.0, -2133.0, -398.0, -1912.0 },
    { -1098.0, -2485.0, -834.0, -2170.0 }
};

new g_HunterZones[sizeof(g_HunterFields)];

public OnGameModeInit()
{

    for(new i = 0; i < sizeof(g_HunterFields); i++) {

        g_HunterZones[i] = GangZoneCreate(XYZ(g_HunterFields[i]), g_HunterFields[i][3]);

        UseGangZoneCheck(g_HunterZones[i], true);
    }

    return 1;
}

public OnPlayerConnect(playerid)
{
    
    TogglePlayerSpectating(playerid, true);    

    return 1;
}