pwl.c: annotate a function as pure
pwl.c: annotate a function as pure

AbiWord/enchant,AbiWord/enchant,albbas/enchant,rrthomas/enchant,albbas/enchant,albbas/enchant,rrthomas/enchant,rrthomas/enchant,AbiWord/enchant,albbas/enchant,rrthomas/enchant,AbiWord/enchant