Fix VPATH build of RQUOTA support. Some rpcgen derive #include "..." paths from the infile argument. This will be off for VPATH builds, as the generated rquota_xdr.c code will look in $(srcdir), but we'll generate the rquota.h file in $(builddir). Play safe and copy rquota.x to $(builddir) first. This fixes the build on openSUSE 11.1.

/* Copyright (c) 2006-2009 Dovecot authors, see the included COPYING file */

#include "lib.h"
#include "close-keep-errno.h"

#include <unistd.h>

void close_keep_errno(int fd)
{
	int old_errno = errno;
	(void)close(fd);
	errno = old_errno;
}