[boost] [ublas] promote_traits doesn't handle size_t under msvc

From: Steven Watanabe (steven_at_[hidden])
Date: 2007-04-14 21:29:11

AMDG

Under msvc 8.0 size_t seems to be defined as __w64 unsigned int.  It seems
to prefer conversion to unsigned int to conversion to unsigned long.  As 
a result
promote_traits returns unsigned int causing warnings all over the place.

In Christ,
Steven Watanabe