is_periodic_ftd

	IS_PERIODIC_FTD(ftd)

	This macro determines whether or not a value represents a
	periodic Frequency Time Descriptor.

	ftd		FTD value to analyze

	This macro returns values as follows:

	TRUE			this is a periodic FTD
	FALSE			this is not a periodic FTD

	This macro is found in: macro_h

	Related macros:

	BUILD_PERIODIC_FTD, IS_ONE_SHOT_FTD, IS_EVENT_FTD