Fix problems when bfd_vma is wider than long.
* i386-dis.c: Make op_address and start_pc unsigned.
(set_op): Make parameter unsigned.
(print_insn_x86): Cast to bfd_vma when passing a value to
print_address_func.
* ns32k-dis.c (CORE_ADDR): Don't define.
(print_insn_ns32k): Change type of addr to bfd_vma. Use
bfd_scan_vma to read back address.
(print_insn_arg): Change type of addr to bfd_vma. Use sprintf_vma
to format it.
* m68k-dis.c (COERCE32): Cast to bfd_signed_vma to avoid overflow.
(NEXTULONG): New definition.
(print_insn_m68k): Avoid overflow when computing third argument of
print_insn_arg.
(print_insn_arg): Use NEXTULONG to fetch 32 bit address values.
Use disp instead of val to store offset values.
(print_indexed): Use base_disp instead of word to store base
displacement, to avoid overflow.
* m10300-dis.c (disassemble): Cast value to long when computing
pc-relative address, to get correct sign extension.