logind: make VT numbers unsigned

Fix the whole code to use "unsigned int" for vtnr. 0 is an invalid vtnr so
we don't need negative numbers at all.

Note that most code already assumes it's unsigned so in case there's a
negative vtnr, our code may, under special circumstances, silently break.
So this patch makes sure all sources of vtnrs verify the validity. Also
note that the dbus api already uses unsigned ints.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/login/loginctl.c b/src/login/loginctl.c
index 2aedbcf922..5547cb2358 100644
--- a/src/login/loginctl.c
+++ b/src/login/loginctl.c
@@ -251,7 +251,7 @@ typedef struct SessionStatusInfo {
         uid_t uid;
         const char *name;
         usec_t timestamp;
-        int vtnr;
+        unsigned int vtnr;
         const char *seat;
         const char *tty;
         const char *display;