Exception message in .appendTo() always shows null

[Alfonso Martínez de Lizarrondo]

If the CKEDITOR.appendTo() method is called with an invalid id the exception generated will always show "[CKEDITOR.editor.appendTo] The element with id "null" was not found" instead of the proper id.

This code fixes it (still searching for proper SVN cliente for Mac):

	CKEDITOR.editor.appendTo = function( elementOrId, config )
	{
		var element = elementOrId;
		if ( typeof element != 'object' )
		{
			element = document.getElementById( elementOrId );

			if ( !element )
				throw '[CKEDITOR.editor.appendTo] The element with id "' + elementOrId + '" was not found.';
		}

		// Create the editor instance.
		return new CKEDITOR.editor( config, element, CKEDITOR.ELEMENT_MODE_APPENDTO );
	};

[Garry Yao]

Targeting it to 3.1 since it's an frequent exception facing developers.

[Garry Yao]

Fixed with [4667].
Thanks for Alfonsoml.