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