[gnome-usage] quit-process-dialog: Remove warning Minor change. Updated for POSIX compliancy. Removes warning.

[Petr Štětka <pstetka src gnome org>]

commit d65216d31afc0d467670c0eec7f3647b11556ac3
Author: carpediem <reachadityahere+gitlab gmail com>
Date:   Fri May 18 17:41:52 2018 +0200

    quit-process-dialog: Remove warning
    Minor change. Updated for POSIX compliancy. Removes warning.

 src/quit-process-dialog.vala | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/quit-process-dialog.vala b/src/quit-process-dialog.vala
index d90e1f7..49a34f2 100644
--- a/src/quit-process-dialog.vala
+++ b/src/quit-process-dialog.vala
@@ -52,7 +52,7 @@ namespace Usage
         private void kill (Pid pid)
         {
             debug ("Terminating %d", (int) pid);
-            Posix.kill(pid, Posix.SIGKILL);
+            Posix.kill(pid, Posix.Signal.KILL);
         }
 
         [GtkCallback]