Fix uninitialized variable in case append_buffer fails with out of memory due to buffer copy allocation
Fix uninitialized variable in case append_buffer fails with out of memory due to buffer copy allocation

git-svn-id: febc13fe83507aab7d46ca3748413bb6c67ab8eb@941 99668b35-9821-0410-8761-19e4c4f06640

zeux/pugixml,zeux/pugixml,zeux/pugixml,zeux/pugixml