Coverity complains about 64-bit time_t vs 64-bit int64_t comparison
``` *** CID 1375988: Integer handling issues (CONSTANT_EXPRESSION_RESULT) /src/or/torcert.c: 160 in tor_cert_parse() 154 cert = tor_malloc_zero(sizeof(tor_cert_t)); 155 cert->encoded = tor_memdup(encoded, len); 156 cert->encoded_len = len; 157 158 memcpy(cert->signed_key.pubkey, parsed->certified_key, 32); 159 const int64_t valid_until_64 = ((int64_t)parsed->exp_field) * 3600; >>> CID 1375988: Integer handling issues (CONSTANT_EXPRESSION_RESULT) >>> "valid_until_64 > 9223372036854775807L /* (time_t)9223372036854775807L */" is always false regardless of the values of its operands. This occurs as the logical operand of if. 160 if (valid_until_64 > TIME_MAX) 161 cert->valid_until = TIME_MAX - 1; 162 else 163 cert->valid_until = (time_t) valid_until_64; 164 cert->cert_type = parsed->cert_type; 165 ```
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