[gdm] gdm-x-session: drop spurious g_getenv call

[Ray Strode <halfline src gnome org>]

commit 752043cc3670928c90211fcfc9df4b8092e1c3d2
Author: Ray Strode <rstrode redhat com>
Date:   Wed Jul 22 09:19:02 2015 -0400

    gdm-x-session: drop spurious g_getenv call
    
    We call g_getenv("XDG_VTNR") twice in a row, when
    the result the first time around is stored in the vt
    variable.
    
    This commit just uses the vt variable again, and
    avoids the second call.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=752724

 daemon/gdm-x-session.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/daemon/gdm-x-session.c b/daemon/gdm-x-session.c
index f8eeb45..58646fa 100644
--- a/daemon/gdm-x-session.c
+++ b/daemon/gdm-x-session.c
@@ -516,7 +516,7 @@ spawn_session (State        *state,
         vt = g_getenv ("XDG_VTNR");
 
         if (vt != NULL) {
-                g_subprocess_launcher_setenv (launcher, "WINDOWPATH", g_getenv ("XDG_VTNR"), TRUE);
+                g_subprocess_launcher_setenv (launcher, "WINDOWPATH", vt, TRUE);
         }
 
         if (run_script) {