[Gtkradiant] compile error

[Jamie Wilkinson]

Hi,

Just updated my repo after seeing your mad checkins over the weekend, and
got a compile error in libs/bytestreamutils.h; the following patch adds the
algorithm header.

Index: libs/bytestreamutils.h
===================================================================
--- libs/bytestreamutils.h      (revision 4943)
+++ libs/bytestreamutils.h      (working copy)
@@ -3,6 +3,7 @@
 #define _INCLUDE_BYTESTREAMUTILS_H_

 #include "idatastream.h"
+#include <algorithm>

 template<typename Type>
 inline void istream_read_little_endian(InputStream& istream, Type& value)