ed3745b51c
Given that ERRNO_IS_RESOURCE() also matches positive values, make sure this macro is not called with arguments that do not have errno semantics. In this case the argument passed to ERRNO_IS_RESOURCE() is the value returned by recurse_dir_at() which can legitimately return positive values without errno semantics, so fix this by moving the ERRNO_IS_RESOURCE() invocation to the branch where the return value is known to be negative.
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