[samgreen]

Code:

SetPlayerTeamFromClass(playerid)
{
  new classid = GetPlayerSkin(playerid);

  if (classid == 0) {
    gTeam[playerid] = TEAM_GROVE;
  } else {
    gTeam[playerid] = TEAM_BALLA;
  }

  return 1;
}

SetPlayerToTeamColor(playerid)
{
  if (gTeam[playerid] == TEAM_GROVE) {
    SetPlayerColor(playerid, TEAM_GROVE_COLOR);
  } else if (gTeam[playerid] == TEAM_BALLA) {
    SetPlayerColor(playerid, TEAM_BALLA_COLOR);
  }

  return 1;
}

The warnings have been fixed.