Add missing return statement (fixes compiler warning).

Signed-off-by: Stefan Weil <weil@mail.berlios.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5523 c046a42c-6fe2-441c-8c8c-71466251a162
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index cf0834f..c1301ee 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -1934,6 +1934,7 @@
     __put_user(host_msginfo->msgtql, &target_msginfo->msgtql);
     __put_user(host_msginfo->msgseg, &target_msginfo->msgseg);
     unlock_user_struct(target_msginfo, target_addr, 1);
+    return 0;
 }
 
 static inline abi_long do_msgctl(int msgid, int cmd, abi_long ptr)