cherenkov/rankingstat.py: add some pdf noramalization

- not needed just being done for safety

gstlal-burst/python/cherenkov/rankingstat.py

@@ -494,12 +494,16 @@ class RankingStatPDF(object):
 		# populate from XML
 		self.noise_lr_lnpdf = rate.BinnedLnPDF.from_xml(xml, "noise_lr_lnpdf")
 		self.zl_lr_lnpdf = rate.BinnedLnPDF.from_xml(xml, "zl_lr_lnpdf")
+		# shouldn't be needed, but just in case
+		self.noise_lr_lnpdf.normalize()
+		self.zl_lr_lnpdf.normalize()
 		return self
 
 	def to_xml(self, name):
 		# do not allow ourselves to be written to disk without our
 		# PDFs' internal normalization metadata being up to date
 		self.noise_lr_lnpdf.normalize()
+		self.zl_lr_lnpdf.normalize()
 		xml = ligolw.LIGO_LW({"Name": "%s:%s" % (name, self.ligo_lw_name_suffix)})
 		xml.appendChild(self.noise_lr_lnpdf.to_xml("noise_lr_lnpdf"))
 		xml.appendChild(self.zl_lr_lnpdf.to_xml("zl_lr_lnpdf"))