[xml] Multithread behaviour on Solaris

["Fabrice DESRE - FT.BD/FTRD/DMI/GRI" <fabrice desre francetelecom com>]

  Hello,

 I'm using libxml/libxslt on Solaris in a multithreaded
application and found an easy to fix bug : The _REENTRANT
flag has to be specified when compiling the library to
avoid inconsistent behaviour of errno.
  Including <errno.h> with _REENTRANT defined make errno
a macro that gets the correct value when in a thread.
Otherwise you always get 0 :-(

 I also noticed that trio.c define errno as an extern int,
which is not the correct way.

        Fabrice
-- 
Fabrice Desré - France Telecom R&D/DMI/GRI
Tel: +(33) 2 96 05 31 43
Fax: +(33) 2 96 05 32 86