Some FF (Mmsapt, LexicalReordering, Many single-value FF) provide this number during "registration";
when missing, a default weight vector of uniform 1.0 is automatically generated. This eliminates the
need for the user to figure out what the exact number of features is for each FF, which can get complicated,
e.g. in the case of Mmsapt/PhraseDictionaryBitextSampling.
I'm adding these because boost::filesystem::unique_path introduces
encoding issues: on Windows the path is in wchar_t, breaking use of
those strings in various places! Encoding the strings is just too
much work.
It's still possible that the current temp_file implementation won't
build on Windows (it uses POSIX mkstemp() and close()) but that can
be fixed underneath the API.
This is one of those little chores in managing a long-lived C++
project: standard C headers like stdio.h and math.h now have their own
place in the C++ standard as resp. cstdio, cmath, and so on. In this
branch the #include names are updated for the moses/ subdirectory; more
branches to follow.
C++11 adds cstdint, but to support compilation with the previous
standard, that change is left for later.
