[vala/staging] posix: Fix return-value of mknod() and c-include for tcgetsid()

[Rico Tzschichholz <ricotz src gnome org>]

commit b7d498c8bcea82f0055b2541c3ec48808f4c2d47
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Fri Jul 19 17:58:45 2019 +0200

    posix: Fix return-value of mknod() and c-include for tcgetsid()
    
    Introduced with 535f2734d19875ccc1f170841b72eba0c4adad1e

 vapi/posix.vapi | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/vapi/posix.vapi b/vapi/posix.vapi
index 26f516e1c..eb385bb70 100644
--- a/vapi/posix.vapi
+++ b/vapi/posix.vapi
@@ -2289,7 +2289,7 @@ namespace Posix {
        [CCode (cheader_filename = "sys/stat.h", feature_test_macro = "_GNU_SOURCE")]
        public int mkdirat (int dirfd, string pathname, mode_t mode);
        [CCode (cheader_filename = "sys/types.h,sys/stat.h,fcntl.h,unistd.h")]
-       public pid_t mknod (string pathname, mode_t mode, dev_t dev);
+       public int mknod (string pathname, mode_t mode, dev_t dev);
        [CCode (cheader_filename = "sys/stat.h", feature_test_macro = "_GNU_SOURCE")]
        public int mknodat (int dirfd, string pathname, mode_t mode, dev_t dev);
 
@@ -2716,7 +2716,7 @@ namespace Posix {
        public int group_member (gid_t gid);
        [CCode (cheader_filename = "unistd.h")]
        public pid_t setsid ();
-       [CCode (cheader_filename = "unistd.h")]
+       [CCode (cheader_filename = "termios.h", feature_test_macro = "_GNU_SOURCE")]
        public pid_t tcgetsid (int fd);
 
        [CCode (cheader_filename = "unistd.h")]