Add semicolons to xm_popcount and uncomment fls
xm_popcount had some missing semicolons at the end of the lines,
not sure if this was intended but gcc 4.6 did not like it.  Adding
in the semicolons allowed compilation of the source.
the fls function defined in msutil.h was commented out which was
causing msutil_t.c to fail. Uncommenting the function solved the
problem