NAME
        InitMasks -- Initialize the BorderLine and CollMask masks of a vsprite.

   SYNOPSIS
        InitMasks(vs)
                  A0

        void InitMasks(struct vsprite *);

   FUNCTION
        Creates the appropriate BorderLine and CollMask masks of the vsprite.
        Correctly detects if the vsprite is actually a bob definition, handles
        the image data accordingly.

   INPUTS
        vs = pointer to the vsprite structure

   RESULT

   BUGS

   SEE ALSO
        initgels()  graphics/gels.h