[easytag] Fix double unref in et_rename_file() error path

[David King <davidk src gnome org>]

commit 153a2f2f822714d9157497f764824df1ff1b1a78
Author: David King <amigadave amigadave com>
Date:   Wed Dec 24 12:58:12 2014 +0000

    Fix double unref in et_rename_file() error path
    
    https://retrace.fedoraproject.org/faf2/problems/558544/
    https://retrace.fedoraproject.org/faf2/problems/552602/

 src/easytag.c |    7 ++-----
 1 files changed, 2 insertions(+), 5 deletions(-)
---
diff --git a/src/easytag.c b/src/easytag.c
index 5d07bac..cf24156 100644
--- a/src/easytag.c
+++ b/src/easytag.c
@@ -741,12 +741,10 @@ et_rename_file (const char *old_filepath, const char *new_filepath,
         /* Ignore an error if the directory already exists. */
         if (!g_error_matches (*error, G_IO_ERROR, G_IO_ERROR_EXISTS))
         {
-            g_object_unref (file_old);
-            g_object_unref (file_new);
             g_object_unref (file_new_parent);
-            g_assert (error == NULL || *error != NULL);
-            return FALSE;
+            goto err;
         }
+
         g_clear_error (error);
     }
 
@@ -830,7 +828,6 @@ out:
     return TRUE;
 
 err:
-    g_object_unref (file_new_parent);
     g_object_unref (file_old);
     g_object_unref (file_new);
     g_assert (error == NULL || *error != NULL);