* ppcobsd-nat.c: Include "gdb_assert.h".

* ppcobsd-nat.c: Include "gdb_assert.h".
[PT_GETFPREGS] (getfpregs_supplies): New function.
(ppcobsd_fetch_registers, ppcobsd_fetch_registers): Hanlde OS
versions that have PT_GETFPREGS.
(_initialize_ppcobsd_nat) [PT_GETFPREGS]: Initialize
ppcobsd_fpreg_offsets.
* ppcobsd-tdep.h (ppcobsd_fpreg_offsets, ppcobsd_fpregset):
Declare.
* ppcobsd-tdep.c (ppcobsd_fpreg_offsets, ppcobsd_fpregset): New
variables.
(_initialize_ppcobsd_tdep): Initialize ppcobsd_fpreg_offsets.
* Makefile.in (ppcobsd-nat.o): Update dependencies.