[gnome-software] trivial: Fix critical warning on 'gnome-software-cmd refine'

[Richard Hughes <rhughes src gnome org>]

commit 49f3a7c9060d73dddbe208ff3ad30e6f35094b37
Author: Richard Hughes <richard hughsie com>
Date:   Tue Dec 6 14:33:30 2016 +0000

    trivial: Fix critical warning on 'gnome-software-cmd refine'

 src/gs-cmd.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-cmd.c b/src/gs-cmd.c
index b28bd7f..072411e 100644
--- a/src/gs-cmd.c
+++ b/src/gs-cmd.c
@@ -338,6 +338,7 @@ main (int argc, char **argv)
                        if (!ret)
                                break;
                }
+               list = gs_app_list_new ();
                gs_app_list_add (list, app);
        } else if (argc == 3 && g_strcmp0 (argv[1], "launch") == 0) {
                app = gs_app_new (argv[2]);