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xmlparse.cpp: add condition to avoid possible crash

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pool->start seems to be a null pointer in some constellations,
memmove don't like such for parameter 2


Origin commit data
------------------
Commit: 25e752fbd8
Author: Thilo Graf <dbt@novatux.de>
Date: 2019-10-27 (Sun, 27 Oct 2019)
This commit is contained in:
Thilo Graf
2019-10-27 22:56:48 +01:00
committed by vanhofen
parent c05c9ab8b6
commit 6146ddb67b
1 changed files with 1 additions and 0 deletions
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lib/xmltree/xmlparse.cpp
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@@ -2732,6 +2732,7 @@ static int poolGrow(STRING_POOL *pool)
tem->next=pool->blocks;
pool->blocks=tem;
if (!pool->start) return 0; //FIXME: hack: pool->start seems to be a null pointer in some constellations, memmove don't like such for parameter 2
memmove(tem->s, pool->start, (pool->ptr-pool->start)*sizeof(XML_Char));