[libdmapsharing] Fix code tested by dmap_av_share_serve_publish_collision_test

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

commit a91a3914568062fb38a540025b4d0c2364fa18c4
Author: W. Michael Petullo <mike flyn org>
Date:   Wed Jul 18 22:19:03 2018 -0400

    Fix code tested by dmap_av_share_serve_publish_collision_test
    
    Signed-off-by: W. Michael Petullo <mike flyn org>

 libdmapsharing/dmap-share.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)
---
diff --git a/libdmapsharing/dmap-share.c b/libdmapsharing/dmap-share.c
index c4602a4..853125e 100644
--- a/libdmapsharing/dmap-share.c
+++ b/libdmapsharing/dmap-share.c
@@ -235,6 +235,7 @@ dmap_share_serve (DmapShare *share, GError **error)
        GSList *listening_uri_list;
        SoupURI *listening_uri;
        gboolean ret;
+       GError *error2 = NULL;
 
        share->priv->server = soup_server_new (NULL, NULL);
 
@@ -286,11 +287,11 @@ dmap_share_serve (DmapShare *share, GError **error)
                                 (SoupServerCallback) _ctrl_int_adapter,
                                 share, NULL);
 
-       ret = soup_server_listen_all (share->priv->server, desired_port, 0, error);
+       ret = soup_server_listen_all (share->priv->server, desired_port, 0, &error2);
        if (ret == FALSE) {
                g_debug ("Unable to start music sharing server on port %d: %s. "
-                        "Trying any open IPv6 port", desired_port, (*error)->message);
-               g_clear_error (error);
+                        "Trying any open IPv6 port", desired_port, error2->message);
+               g_error_free(error2);
 
                ret = soup_server_listen_all (share->priv->server, SOUP_ADDRESS_ANY_PORT,
                                              0, error);