arp-ioctl.c:221: 3 * off by one error

[dcb314]

Static analyser cppcheck says:

arp-ioctl.c:221:7: error: Width 100 given in format string (no. 4) is larger than destination buffer 'macbuf[100]', use %99s to prevent overflowing it. [invalidScanfFormatWidth]
arp-ioctl.c:221:7: error: Width 100 given in format string (no. 5) is larger than destination buffer 'maskbuf[100]', use %99s to prevent overflowing it. [invalidScanfFormatWidth]
arp-ioctl.c:221:7: error: Width 100 given in format string (no. 6) is larger than destination buffer 'devbuf[100]', use %99s to prevent overflowing it. [invalidScanfFormatWidth]
route-linux.c:223:8: error: Width 16 given in format string (no. 1) is larger than destination buffer 'ifbuf[16]', use %15s to prevent overflowing it. [invalidScanfFormatWidth]

[ofalk]

This is already fixed in the devel branch with commit 661c728 .