ICMP: Fix an undefined behavior for the Interface Name Sub-Object

ICMP: Fix an undefined behavior for the Interface Name Sub-Object

Add a test for the Interface Name Sub-Object length == 0.
If inft_name_length_field == 0, nd_printjnp() was called with
inft_name_length_field - 1 == -1.

Add a test file.

The error was:
print-icmp.c:893:37: runtime error: implicit conversion from type 'int'
of value -1 (32-bit, signed) to type 'u_int' (aka 'unsigned int')
changed the value to 4294967295 (32-bit, unsigned)

SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior print-icmp.c:893:37