Francois-Xavier Le Bail 59868ef671 RIP: Fix two loops for undefined behavior at runtime ...

1) RIPv2
The error was:
print-rip.c:386:9: runtime error: unsigned integer overflow: 16 - 20
cannot be represented in type 'unsigned int'

Without this change the unsigned integer variable 'len' is assigned a
very high value, because of underflow, and the loop continue incorrectly.

Add a test case.

2) RIPv1
Same bugfix, based on a code inspection, so comes without a test case.

2019-03-09 15:13:51 +01:00

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