Change wl_os_dupfd_cloexec minfd to be int

The fcntl() argument is defined to be an int and not a long. This does not
matter on most architectures since the value is passed in registers, but
it causes issues on big-endian architectures that pass variadic arguments
on the stack.

Signed-off-by: Alex Richardson <Alexander.Richardson@cl.cam.ac.uk>
Reviewed-by: Simon Ser <contact@emersion.fr>

src/wayland-os.h

@@ -30,7 +30,7 @@ int
 wl_os_socket_cloexec(int domain, int type, int protocol);
 
 int
-wl_os_dupfd_cloexec(int fd, long minfd);
+wl_os_dupfd_cloexec(int fd, int minfd);
 
 ssize_t
 wl_os_recvmsg_cloexec(int sockfd, struct msghdr *msg, int flags);