[Bro] no sha1\md5 for some logs in files.log

[Izik Birka]

Hi
Why there some logs  in files.log that not contains the sha1 or md5  value ?

For example :

Jun  8 11:32:39 127.0.0.1 bro_files: 1496910758.272740|FIMpTB242jcRsKCCYj|x.x.x.x|x.x.x.x|CAuOUv3lwBwigjH7mk|SMB|0|MD5,SHA1|-|test\test111\bro\go.pdf|0.021820|F|F|581600|1040352|458752|65536|F|-|-|-|-|-



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