3 files changed, 16 insertions, 0 deletions
diff --git a/plugins/artwork/artwork.c b/plugins/artwork/artwork.c
index aa4fc64e..1489b72d 100644
--- a/plugins/artwork/artwork.c
+++ b/plugins/artwork/artwork.c
@@ -515,6 +515,8 @@ artwork_plugin_start (void)
     mutex = deadbeef->mutex_create_nonrecursive ();
     cond = deadbeef->cond_create ();
     tid = deadbeef->thread_start_low_priority (fetcher_thread, NULL);
+
+    return 0;
 }
 
 static int
@@ -537,6 +539,8 @@ artwork_plugin_stop (void)
     if (cond) {
         deadbeef->cond_free (cond);
     }
+
+    return 0;
 }
 
 static const char settings_dlg[] =
diff --git a/plugins/gtkui/gtkui.c b/plugins/gtkui/gtkui.c
index c61a1d31..d592f268 100644
--- a/plugins/gtkui/gtkui.c
+++ b/plugins/gtkui/gtkui.c
@@ -460,17 +460,21 @@ playlistswitch_cb (gpointer none) {
 static int
 gtkui_on_playlistswitch (DB_event_t *ev, uintptr_t data) {
     g_idle_add (playlistswitch_cb, NULL);
+    return 0;
 }
 
 static int
 gtkui_on_frameupdate (DB_event_t *ev, uintptr_t data) {
     g_idle_add (update_songinfo, NULL);
+
+    return 0;
 }
 
 static int
 gtkui_on_volumechanged (DB_event_t *ev, uintptr_t data) {
     GtkWidget *volumebar = lookup_widget (mainwin, "volumebar");
     gdk_window_invalidate_rect (volumebar->window, NULL, FALSE);
+
     return 0;
 }
 
diff --git a/plugins/hotkeys/hotkeys.c b/plugins/hotkeys/hotkeys.c
index 3a27b237..0fffdf0c 100644
--- a/plugins/hotkeys/hotkeys.c
+++ b/plugins/hotkeys/hotkeys.c
@@ -281,6 +281,8 @@ read_config (Display *disp)
             XGrabKey (disp, commands[i].keycode, commands[i].modifier | flags, DefaultRootWindow (disp), False, GrabModeAsync, GrabModeAsync);
         }
     }
+
+    return 0;
 }
 
 DB_plugin_t *
@@ -300,6 +302,8 @@ x_err_handler (Display *d, XErrorEvent *evt) {
     char buffer[1024];
     XGetErrorText (d, evt->error_code, buffer, sizeof (buffer));
     fprintf (stderr, "hotkeys: xlib error: %s\n", buffer);
+
+    return 0;
 }
 
 static void
@@ -379,6 +383,8 @@ hotkeys_start (void) {
     read_config (disp);
     XSync (disp, 0);
     loop_tid = deadbeef->thread_start (hotkeys_event_loop, 0);
+
+    return 0;
 }
 
 static int
@@ -388,6 +394,8 @@ hotkeys_stop (void) {
         deadbeef->thread_join (loop_tid);
         cleanup ();
     }
+
+    return 0;
 }
 
 const char *