It seems that [`tiny_fd_buffer_size_by_mtu_ex`](https://github.com/Kerr-srl/tinyproto/blob/262f3cda83144165cebd55817632a20422eab1c1/src/proto/fd/tiny_fd.c#L1264-L1280) computes the wrong buffer size to allocate and then `tiny_fd_init` enters into [this condition](https://github.com/Kerr-srl/tinyproto/blob/262f3cda83144165cebd55817632a20422eab1c1/src/proto/fd/tiny_fd.c#L760-L765).
It seems that
tiny_fd_buffer_size_by_mtu_excomputes the wrong buffer size to allocate and thentiny_fd_initenters into this condition.