Re: [Libguestfs] [PATCH nbdkit] server: Initialize ‘buf’ to avoid GCC 9.0.1 warning.

GCC 9.0.1 isn't smart enough to work out that buf is initialized on all the relevant paths that lead to backend->pwrite being called. By initializing it we can avoid the warning. protocol.c: In function ‘protocol_recv_request_send_reply’: protocol.c:241:9: error: ‘buf’ may be used uninitialized in this function [-Werror=maybe-uninitialized] 241 | if (backend->pwrite (backend, conn, buf, count, offset, f, &err) == -1) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ protocol.c:614:9: note: ‘buf’ was declared here 614 | char *buf; | ^~~