[grilo] registry: Change variable name plugin -> groupname

[Victor Toso <victortoso src gnome org>]

commit 7ee38142350ba9c7fd665e74b60060111895c4bf
Author: Victor Toso <me victortoso com>
Date:   Wed Aug 15 23:31:50 2018 +0200

    registry: Change variable name plugin -> groupname
    
    The group name is only considered as plugin at the moment but followed
    patch will change it to consider plugin name + source name.
    
    This is a preparatory patch for that change.
    Signed-off-by: Victor Toso <victortoso gnome org>

 src/grl-registry.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/src/grl-registry.c b/src/grl-registry.c
index 27fd41c..f51a62c 100644
--- a/src/grl-registry.c
+++ b/src/grl-registry.c
@@ -2006,19 +2006,19 @@ add_config_from_keyfile (GKeyFile    *keyfile,
   GrlConfig *config;
   gchar **key;
   gchar **keys;
-  gchar **plugin;
+  gchar **groupname;
   gchar **plugins;
   gchar *value;
 
   /* Look up for defined plugins */
   plugins = g_key_file_get_groups (keyfile, NULL);
-  for (plugin = plugins; *plugin; plugin++) {
-    config = grl_config_new (*plugin, NULL);
+  for (groupname = plugins; *groupname; groupname++) {
+    config = grl_config_new (*groupname, NULL);
 
     /* Look up configuration keys for this plugin */
-    keys = g_key_file_get_keys (keyfile, *plugin, NULL, NULL);
+    keys = g_key_file_get_keys (keyfile, *groupname, NULL, NULL);
     for (key = keys; *key; key++) {
-      value = g_key_file_get_string (keyfile, *plugin, *key, NULL);
+      value = g_key_file_get_string (keyfile, *groupname, *key, NULL);
       if (value) {
         grl_config_set_string (config, *key, value);
         g_free (value);