Fix sms variables check

Author: sendpulse

pysendpulse/__init__.py

@@ -2,4 +2,4 @@
 __author_email__ = '[email protected]'
 __copyright__ = 'Copyright 2017, SendPulse'
 __credits__ = ['Maksym Ustymenko', ]
-__version__ = '0.0.9'
+__version__ = '0.1.0'

pysendpulse/pysendpulse.py

@@ -870,7 +870,7 @@ def sms_update_phones_variables(self, addressbook_id, phones, variables):
 
         @return: dictionary with response message
         """
-        if not addressbook_id or not phones or variables:
+        if not addressbook_id or not phones or not variables:
             return self.__handle_error("Empty addressbook id or phones or variables")
         try:
             phones = json.dumps(phones)