* i386-dis.c (dis386[], dis386_twobyte[]): change pushl/popl
to pushS/popS for segment regs and byte constant so that
pushw/popw printed when in 16 bit data mode.
* i386-dis.c (dis386[]): change cwtl, cltd to cWtS, cStd to
print cbtw, cwtd in 16 bit data mode.
* i386-dis.c (putop): extra case W to support above.
* i386-dis.c (print_insn_x86): print addr32 prefix when given
address size prefix in 16 bit address mode.
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