warning 224: indeterminate array size in "sizeof" expression (symbol "") - Wieso? - Car System

enum ENUM_CI{
    Float:c_x,
    Float:c_y,
    Float:c_z,
    Float:c_r,
    cid,
    farbe1,
    farbe2,
    besitzer[MAX_PLAYER_NAME]
};
new cInfo[MAX_VEHICLES][ENUM_CI];


ocmd:car(playerid)
{
	new Float:X, Float:Y, Float:Z, Float:R;
	GetPlayerPos(playerid,X,Y,Z);
	GetPlayerFacingAngle(playerid,R);
	createPlayerCar(playerid,500, X, Y, Z, R, 1, 1);
	return 1;
}
stock createPlayerCar(playerid,modelid,Float:x,Float:y,Float:z,Float:r, color1, color2)
{
	for(new i=0; i<sizeof(cInfo); i++)
	{
	    new string[128];
	    if(cInfo[i][cid]!=0)continue;
		GetPlayerName(playerid, cInfo[i][besitzer], MAX_PLAYER_NAME);
	    cInfo[i][c_x]=x;
	    cInfo[i][c_y]=y;
	    cInfo[i][c_z]=z;
	    cInfo[i][c_r]=r;
	    cInfo[i][farbe1]=color1;
		cInfo[i][farbe2]=color2;
	    cInfo[i][cid] = CreateVehicle(modelid,x,y,z,r,color1,color2,-1);
		format(string,sizeof(string),"Das Auto cInfo[%i] wurde erfolgreich erstellt.", i);
		SendClientMessage(playerid, -1, string);
		PutPlayerInVehicle(playerid, cInfo[i][cid], 0);
	    return 1;
	}
	return 1;
}