that on on mingw and
msvc systems, P_tmpdir is defined to _P_tmpdir always.
- The function get_tmp_dir is overly complicated. We can use a large enough
buffer.
- There is no need to write GetTempPathA instead of GetTempPath. Gnulib
assumes that the macro UNICODE is not defined.
In PSPP we are using the path_search function from the tmpdir module to
determine the path for temporary files.
Windows users have complained that it puts temporary files in places they
consider to be inappropriate. I did a bit of research, and found that the
"normal" path on windows depends on
