add failsafes for shop

Author: fourjr

crasync/models.py

@@ -92,11 +92,17 @@ def __init__(self, data):
         self.legendary = 0
         self.epic = 0
         self.arena = 0
-        if data.get('legendary') > 0:
+        if data.get('legendary') is None:
+            self.legendary = None
+        elif data.get('legendary') > 0:
             self.legendary = data.get('legendary')
-        if data.get('epic') > 0:
+        if data.get('epic') is None:
+            self.epic = None
+        elif data.get('epic') > 0:
             self.epic = data.get('epic')
-        if data.get('arena') > 0:
+        if data.get ('arena') is None:
+            self.arena = None
+        elif data.get('arena') > 0:
             self.arena = data.get('arena')
 
 class Cycle: