NAME
        InitGels -- initialize a gel list; must be called before using gels.

   SYNOPSIS
        InitGels(head, tail, GInfo)
                 A0    A1    A2

        void InitGels(struct vsprite *, struct vsprite *, struct gelsinfo *);

   FUNCTION
        Assigns the VSprites as the head and tail of the gel list in gfxbase.
        Links these two gels together as the keystones of the list.
        If the collHandler vector points to some memory array, sets
        the BORDERHIT vector to NULL.

   INPUTS
        head  = pointer to the vsprite structure to be used as the gel list head
        tail  = pointer to the vsprite structure to be used as the gel list tail
        GInfo = pointer to the gelsinfo structure to be initialized

   RESULT

   BUGS

   SEE ALSO
        graphics/gels.h  graphics/rastport.h