Minor clean up.
* mpi/mpi-internal.h: Remove extra semicolon from the macro. * mpi/mpih-mul.c: Likewise. * src/cipher-proto.h: Remove duplication for enum pk_encoding. * mpi/mpi-pow.c (_gcry_mpi_powm): Initialize XSIZE.
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>