PHP 8 compatibility: Fix passing null to string parameter parameter

framework/console/CConsoleCommand.php

@@ -229,6 +229,9 @@ abstract class CConsoleCommand extends CComponent
 		$params=array();	// unnamed parameters
 		foreach($args as $arg)
 		{
+            if (is_null($arg))
+                continue;
+
 			if(preg_match('/^--(\w+)(=(.*))?$/',$arg,$matches))  // an option
 			{
 				$name=$matches[1];