Fix issue with InstantiateNewClassesSniff

The following line would trigger issues with the InstantiateNewClassesSniff:
$model = new JModelDatabase(new JRegistry, JFactory::getDbo());

This incorrectly finds the JFactory::getDbo() parenthesis and assumes they're there for the JRegistry call. This pull request adds the comma to the list of escape tokens to reset the call.

Sniffs/Classes/InstantiateNewClassesSniff.php

@@ -58,6 +58,7 @@ public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr)
                 switch ($tokens[$cnt]['code'])
                 {
                     case T_SEMICOLON:
+                    case T_COMMA :
                         $valid = true;
                         $running = false;
                         break;