[gnome-software] trivial: Fix last rebase typo

[Richard Hughes <rhughes src gnome org>]

commit 17758c931c8ffa47e2c8e7cb5e5d4a5802f7f37e
Author: Richard Hughes <richard hughsie com>
Date:   Mon May 23 11:31:09 2016 +0100

    trivial: Fix last rebase typo

 src/gs-plugin.h |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/gs-plugin.h b/src/gs-plugin.h
index 4286779..1160423 100644
--- a/src/gs-plugin.h
+++ b/src/gs-plugin.h
@@ -254,7 +254,7 @@ GsApp               *gs_plugin_cache_lookup                 (GsPlugin       *plugin,
 void            gs_plugin_cache_add                    (GsPlugin       *plugin,
                                                         const gchar    *key,
                                                         GsApp          *app);
-GsApp          *gs_plugin_cache_invalidate             (GsPlugin       *plugin);
+void            gs_plugin_cache_invalidate             (GsPlugin       *plugin);
 void            gs_plugin_status_update                (GsPlugin       *plugin,
                                                         GsApp          *app,
                                                         GsPluginStatus  status);