fix ast_boolop truth test; see #438

custom_components/pyscript/eval.py

@@ -1690,7 +1690,7 @@ async def ast_boolop(self, arg):
             return val
         for arg1 in arg.values:
             val = await self.aeval(arg1)
-            if val != 0:
+            if val:
                 return val
         return 0