illumos gate

Under certain circumstances, "isainfo -v" can overflow 80 columns. e.g.:

[root@bh1-kvm3 /var/tmp]# isainfo -v
64-bit amd64 applications
        sse4.2 sse4.1 ssse3 popcnt tscp cx16 sse3 sse2 sse fxsr mmx cmov amd_sysc 
        cx8 tsc fpu 
32-bit i386 applications
        sse4.2 sse4.1 ssse3 popcnt tscp ahf cx16 sse3 sse2 sse fxsr mmx cmov 
        sep cx8 tsc fpu

This is due to a minor miscalculation in when the line should be wrapped; the length of the feature about to be written must be taken into consideration. Fix is, as what might expect, trivially simple.