When input validation was added to core_history_API.php, bug_update.php was changed to reflect the standard of passing unescaped data to functions (to prevent double-escaping). This however caused problems when the old value and the new value of integer fields were compared; '' used to be equal to 0000000, but it no longer was. This commit fixes this by passing casted/checked integer values. String values are still handled the same. (This commit also removes a duplicate assignment of ).

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@1189 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9