Replace all check_result() and fprintf() calls inside check_no_rrsig()
with zoneverify_log_error() calls and error handling code. Enable
check_no_rrsig() to signal errors to the caller using its return
value.
Modify the call site of check_no_rrsig() so that its errors are properly
handled.
Define buffer size using a named constant rather than a plain integer.
Michał Kępień
0ed9ec49ed