plscmap0n: Set number of colors in color map0 

DESCRIPTION:

    The drivers are not guaranteed to support more than 16 colors. 

SYNOPSIS:

plscmap0n(ncol0)

ARGUMENTS:

    ncol0 (PLINT, input) :    Number of colors that will be allocated in
    the map0 palette. If this number is zero or less, then the value
    from the previous call to plscmap0n is used and if there is no
    previous call, then a default value is used.