picomon/checks.py: fix missing parenthesis in CheckTLSCert().

picomon/checks.py

@@ -314,7 +314,7 @@ class CheckTLSCert(Check):
     def build_command(self):
         command = ['/usr/lib/nagios/plugins/check_http',
                    '--ssl', '--sni',
-                   '-C', str(self._options.get('warn', 7),
+                   '-C', str(self._options.get('warn', 7)),
                    '-t', str(self.timeout)]
         if 'port' in self._options:
             command += ['-p', str(self._options['port'])]