Dmitry V. Levin
8dfb0ef165
Given that ERRNO_IS_DISCONNECT() also matches positive values, make sure this macro is not called with arguments that do not have errno semantics. In this case the arguments passed to ERRNO_IS_DISCONNECT() are the values returned by instance_from_socket(), socket_load_service_unit(), and service_set_socket_fd() which are not expected to return any positive values, but let's be consistent anyway and move ERRNO_IS_DISCONNECT() invocations to the branches where the return values are known to be negative.
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