With gcc 4.7 installed we where not able to save a odt file because the xml...

With gcc 4.7 installed we where not able to save a odt file because the xml file that was generated was
missing the '>' for a tag. Example
 <manifest:file-entry manifest:media-type="" manifest:full-path="Thumbnails/thumbnail.png"
 </manifest:file-entry>

The missing close tag was because while doing a stack.pop the hasChildren (a bitfield) of Tag was not
populated correctly. This patch fixes this problem(workaround for a gcc bug? not sure)

BUGS: 298134
REVIEW: 104677