Fixed 0003577: Unselecting custom fields causes undesired break lines in Excel.

M print_all_bug_page_excel.php

• Moved the </td>'s inside the if statements, so that if a field is skipped, the code won't generate a </td> that does not have a matching <td>.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2370 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9