[xml] patch: problem with xmlParseBalancedChunkMemory containing entities

[Rob Richards <rrichards cdatazone org>]

I hit an issue that causes a crash when using 
xmlParseBalancedChunkMemory with data that contains an entity.
i.e. <test><data>&nbsp;</data></test>
The xmlDocPtr passed in to the function does contain the entity 
declarations btw

When the entity is parsed a call to xmlParseBalancedChunkInternal is 
made with the context created from xmlParseBalancedChunkMemory which has 
a temporary myDoc property. The content is cretated as being owned by 
the temporary doc.

The temporary doc from the top level xmlParseBalancedChunkMemory is 
freed leaving the created list from when the entity was parsed with an 
invalid pointer which ultimately causes a crash when the structure is freed.

Attached patch just sets the owning doc for the list to the same one 
that owns the parent entity if not so already.
No issues ever with dict as the dict from the original doc is passed 
along in each of the new contexts.

Rob

Attachment: parser.c.diff.txt
Description: Text document