Fix the build on 4.x. The problem was that the definition of the std::wstring
class is commented out on FreeBSD 4 because <cwctype> is missing. Tim Robbin
has shown the workaround for this in freebsd-stable. Also, remove USE_GCC=3.3
and it can build on 4.x's default GCC 2.9x now.
Reported by: bento via kris
Tested by: pav and Rashid N. Achilov <email@example.com>
Approved by: adamw (mentor)