* sparc-tdep.c (sparc32_frame_prev_register): Change type of last

* sparc-tdep.c (sparc32_frame_prev_register): Change type of last
argument to `gdb_byte *'.
* sparcnbsd-tdep.c (sparc32nbsd_sigcontext_frame_prev_register):
Likewise.
* sparcobsd-tdep.c (sparc32obsd_frame_prev_register): Likewise.
* sparc-sol2-tdep.c (sparc32_sol2_sigtramp_frame_prev_register):
Likewise.
* sparc64-tdep.c (sparc64_frame_prev_register): Likewise.
* sparc64fbsd-tdep.c (sparc64fbsd_sigtramp_frame_prev_register):
Likewise.
* sparc64nbsd-tdep.c (sparc64nbsd_sigcontext_frame_prev_register):
Likewise.
* sparc64obsd-tdep.c (sparc64obsd_frame_prev_register): Likewise.
* sparc64-sol2-tdep.c (sparc64_sol2_sigtramp_frame_unwind):
Likewise.