[gnome-software] Correctly register GS_PLUGIN_ERROR

[Richard Hughes <rhughes src gnome org>]

commit 0e96421a3c178454a9c8223873e3ae9535d80b51
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Aug 2 10:39:32 2016 +1200

    Correctly register GS_PLUGIN_ERROR

 src/gs-plugin.c |    2 ++
 src/gs-plugin.h |    4 +++-
 2 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-plugin.c b/src/gs-plugin.c
index 4729c33..76ad484 100644
--- a/src/gs-plugin.c
+++ b/src/gs-plugin.c
@@ -77,6 +77,8 @@ typedef struct
 
 G_DEFINE_TYPE_WITH_PRIVATE (GsPlugin, gs_plugin, G_TYPE_OBJECT)
 
+G_DEFINE_QUARK (gs-plugin-error-quark, gs_plugin_error)
+
 enum {
        PROP_0,
        PROP_FLAGS,
diff --git a/src/gs-plugin.h b/src/gs-plugin.h
index 45b4b9f..c2a48f4 100644
--- a/src/gs-plugin.h
+++ b/src/gs-plugin.h
@@ -231,7 +231,9 @@ typedef enum {
 } GsPluginRule;
 
 /* helpers */
-#define        GS_PLUGIN_ERROR                                 1
+#define        GS_PLUGIN_ERROR                                 gs_plugin_error_quark ()
+
+GQuark          gs_plugin_error_quark                  (void);
 
 /* public getters and setters */
 GsPluginData   *gs_plugin_alloc_data                   (GsPlugin       *plugin,