pack rw_args struct

This saves one word of stack space, potentially improving
performance a miniscule amount.

1 files changed, 1 insertions, 1 deletions

diff --git a/ext/posix_mq/posix_mq.c b/ext/posix_mq/posix_mq.c
index 1b56608..14fe819 100644
--- a/ext/posix_mq/posix_mq.c
+++ b/ext/posix_mq/posix_mq.c
@@ -141,13 +141,13 @@ struct open_args {
 /* used to pass arguments to mq_send/mq_receive inside blocking region */
 struct rw_args {
         mqd_t des;
+        unsigned msg_prio;
         union {
                 ssize_t received;
                 int retval;
         };
         char *msg_ptr;
         size_t msg_len;
-        unsigned msg_prio;
         struct timespec *timeout;
 };