[gnome-software/wip/rancell/apt] Set error on dpkg-deb exec failure

[William Hua <williamhua src gnome org>]

commit cc240188a0b67ff8d50c7eac291250a2e0a0b818
Author: William Hua <william hua canonical com>
Date:   Thu Mar 3 16:04:05 2016 -0500

    Set error on dpkg-deb exec failure

 src/plugins/gs-plugin-apt.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/gs-plugin-apt.c b/src/plugins/gs-plugin-apt.c
index 38a2224..afa9ced 100644
--- a/src/plugins/gs-plugin-apt.c
+++ b/src/plugins/gs-plugin-apt.c
@@ -875,7 +875,7 @@ gs_plugin_filename_to_app (GsPlugin      *plugin,
                           &output,
                           NULL,
                           NULL,
-                          NULL))
+                          error))
                return FALSE;
 
        tokens = g_strsplit (output, "\n", 0);