[libdmapsharing] Remove use of G_GNUC_FALLTHROUGH

[W. Michael Petullo <wmpetullo src gnome org>]

commit c4f3b677ffe7fb347429653999110f0e6ea61a1f
Author: W. Michael Petullo <mike flyn org>
Date:   Tue Jun 30 16:23:59 2020 -0500

    Remove use of G_GNUC_FALLTHROUGH
    
    G_GNUC_FALLTHROUGH was not available until glib-2.60. Avoiding it allows
    libdmapsharing to compile in more places.
    
    Closes 17.

 tests/test-dmap-server.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
---
diff --git a/tests/test-dmap-server.c b/tests/test-dmap-server.c
index e256415..35c5fcc 100644
--- a/tests/test-dmap-server.c
+++ b/tests/test-dmap-server.c
@@ -83,7 +83,8 @@ create_share (guint conn_type, GMainLoop *loop)
        switch (conn_type) {
        default:
                g_idle_add(_quit, loop);
-               G_GNUC_FALLTHROUGH;
+               factory = DMAP_RECORD_FACTORY (test_dmap_av_record_factory_new ());
+               break;
        case DAAP:
                factory = DMAP_RECORD_FACTORY (test_dmap_av_record_factory_new ());
                break;