Fix PHP warning in html_table::set_row_attribs() in PHP 5.4 (#1489094)

Aleksander Machniak

2013-05-24 ace518fa6e96f34d674b603c0521830515af800e

 program/lib/Roundcube/html.php

@@ -771,6 +771,11 @@
            $index = $this->rowindex;
        }

        // make sure row object exists (#1489094)
        if (!$this->rows[$index]) {
            $this->rows[$index] = new stdClass;
        }

        $this->rows[$index]->attrib = $attr;
    }