This object along with xcmPrtInterpPCLPitchNumerator sets
the default for the PCL-specific PJL variable 'PITCH'.
These two object sets the default pitch size for the PCL default
font defined in xcmPrtInterpreterPCLFontNumberDflt.
The PITCH variable only applies when the default font specified
is a scalable fixed pitch font.
A value of zero shall mean not specified.
It is expected that a typical application will set
xcmPrtInterpPCLPitchDenominator to 100.