[gnome-builder] Revert "buildsystem: remove unused priv var"

[Matthew Leeds <mwleeds src gnome org>]

commit 5f79eb7fb91e3f6f48fcbfafdfea6fd5c99a0335
Author: Matthew Leeds <mleeds redhat com>
Date:   Sun Feb 19 14:12:18 2017 -0600

    Revert "buildsystem: remove unused priv var"
    
    This reverts commit 41403cbad6e754f59612ed8ead07193f81e310f8.

 libide/buildsystem/ide-build-stage-launcher.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/libide/buildsystem/ide-build-stage-launcher.c b/libide/buildsystem/ide-build-stage-launcher.c
index e113eea..0282e27 100644
--- a/libide/buildsystem/ide-build-stage-launcher.c
+++ b/libide/buildsystem/ide-build-stage-launcher.c
@@ -113,6 +113,7 @@ ide_build_stage_launcher_run (IdeBuildStage         *stage,
                               gpointer               user_data)
 {
   IdeBuildStageLauncher *self = (IdeBuildStageLauncher *)stage;
+  IdeBuildStageLauncherPrivate *priv = ide_build_stage_launcher_get_instance_private (self);
   g_autoptr(GTask) task = NULL;
   g_autoptr(GError) error = NULL;
   g_autoptr(IdeSubprocess) subprocess = NULL;