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