[gnome-software/gnome-3-26] Add missing locking to gs_plugin_cache_remove()

[Kalev Lember <klember src gnome org>]

commit a6059076abcb12fc18178c6dc71b64ef4f8e924b
Author: Kalev Lember <klember redhat com>
Date:   Tue Jan 2 22:05:36 2018 +0100

    Add missing locking to gs_plugin_cache_remove()

 lib/gs-plugin.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/lib/gs-plugin.c b/lib/gs-plugin.c
index 0a14f43..d844c46 100644
--- a/lib/gs-plugin.c
+++ b/lib/gs-plugin.c
@@ -1496,6 +1496,7 @@ void
 gs_plugin_cache_remove (GsPlugin *plugin, const gchar *key)
 {
        GsPluginPrivate *priv = gs_plugin_get_instance_private (plugin);
+       g_autoptr(GMutexLocker) locker = g_mutex_locker_new (&priv->cache_mutex);
 
        g_return_if_fail (GS_IS_PLUGIN (plugin));
        g_return_if_fail (key != NULL);