[xslt] crypto.c on win32

[Stéphane Bidoul <stephane bidoul softwareag com>]

I had to apply the following patch to compile with VC6 SP5, without a more
recent PSDK:

-sbi

Index: crypto.c
===================================================================
RCS file: /cvs/gnome/libxslt/libexslt/crypto.c,v
retrieving revision 1.2
diff -r1.2 crypto.c
119a120
> #define _WIN32_WINNT 0x0400
121a123,125
> #ifndef CRYPT_SILENT
> #define CRYPT_SILENT 0x40
> #endif