Correct Length conditional when filtering in PhantomJS. Fixes #1817

Author: AutomatedTester

py/selenium/webdriver/phantomjs/service.py

@@ -51,7 +51,7 @@ def __init__(self, executable_path, port=0, service_args=None, log_path=None):
 
 
     def _args_contain(self, arg):
-        return len(filter(lambda x:x.startswith(arg), self.service_args)) > 0
+        return len(list(filter(lambda x:x.startswith(arg), self.service_args))) > 0
 
     def command_line_args(self):
         return self.service_args + ["--webdriver=%d" % self.port]