GetFirstEnteringPC

//RWT-OEI 09/07/05
//This returns the first entering player object when called from an 
//OnClientEnter script. Should never return INVALID_OBJECT unless
//called from a script other than an OnClientEnter script.
//To be used along with GetNextEnteringPC() to iterate over the
//list of entering PCs
object GetFirstEnteringPC();