[rhythmbox] shell-player: avoid NULL unref when there's no next entry

[Jonathan Matthew <jmatthew src gnome org>]

commit b58cf63f196b22a9bce31f1da8b8fd4403ed637a
Author: Jonathan Matthew <jonathan d14n org>
Date:   Fri Aug 19 22:26:13 2016 +1000

    shell-player: avoid NULL unref when there's no next entry
    
    https://bugzilla.gnome.org/show_bug.cgi?id=770134

 shell/rb-shell-player.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/shell/rb-shell-player.c b/shell/rb-shell-player.c
index 5aa03b1..2ad5de2 100644
--- a/shell/rb-shell-player.c
+++ b/shell/rb-shell-player.c
@@ -1749,9 +1749,10 @@ rb_shell_player_property_row_activated_cb (RBPropertyView *view,
                        rb_shell_player_error (player, FALSE, error);
                        g_clear_error (&error);
                }
+
+               rhythmdb_entry_unref (entry);
        }
 
-       rhythmdb_entry_unref (entry);
        g_object_unref (porder);
 }