Fix division to zero in passrate method

Related-Prod: PRODX-48948
Change-Id: I8be2e82e30603ef9273b2bbee4d85c1d87293bcc
diff --git a/rp_reporter/rp_reporter/report_from_xml.py b/rp_reporter/rp_reporter/report_from_xml.py
index 6dcb7c7..ac8661b 100644
--- a/rp_reporter/rp_reporter/report_from_xml.py
+++ b/rp_reporter/rp_reporter/report_from_xml.py
@@ -63,6 +63,8 @@
 
     @property
     def passrate(self):
+        if self.total <= 0:
+            return 0
         return (self.passed / self.total) * 100
 
     def add_passed(self):