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026833214a
This was provided as a courtesy to hopefully make custom attributes more easy to use, however the zeroing turned out to be a bit complicated when syncing custom attributes across multiple open files. Implicitly zeroing trailing buffer space is also inconsistent with the other APIs in the filesystem, such as lfs_file_read, so this commit removes the behavior. If you need to handle differently sized custom attributes, you can either pre-zero the custom attribute buffers, or use lfs_getattr to find the on-disk size of custom attributes explicitly.