Lookup a blob object from a repository,
given a prefix of its identifier (short id).
@see git_object_lookup_prefix
@param blob pointer to the looked up blob
@param repo the repo to use when locating the blob.
@param id identity of the blob to locate.
@param len the length of the short identifier
@return 0 or an error code
Lookup a blob object from a repository, given a prefix of its identifier (short id).
@see git_object_lookup_prefix
@param blob pointer to the looked up blob @param repo the repo to use when locating the blob. @param id identity of the blob to locate. @param len the length of the short identifier @return 0 or an error code