Don't int(0)

Author: bouwew

plugwise/util.py

@@ -73,7 +73,7 @@ def escape_illegal_xml_characters(xmldata):
 
 def format_measure(measure, unit):
     """Format measure to correct type."""
-    if unit == PERCENTAGE:
+    if unit == PERCENTAGE and measure > 0:
         measure = int(measure * 100)
     if unit == ENERGY_KILO_WATT_HOUR:
         measure = measure / 1000