[rhythmbox] rhythmdb: check entry was added before attempting to cache metadata

[Jonathan Matthew <jmatthew src gnome org>]

commit 036ed0a652b203004ed4b037de3bda8005e0b374
Author: Jonathan Matthew <jonathan d14n org>
Date:   Mon Mar 7 22:11:15 2016 +1000

    rhythmdb: check entry was added before attempting to cache metadata
    
    rhythmdb_add_import_error_entry doesn't always create an entry.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=763206

 rhythmdb/rhythmdb.c |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/rhythmdb/rhythmdb.c b/rhythmdb/rhythmdb.c
index cffead3..1013f78 100644
--- a/rhythmdb/rhythmdb.c
+++ b/rhythmdb/rhythmdb.c
@@ -2528,7 +2528,9 @@ rhythmdb_process_metadata_load (RhythmDB *db, RhythmDBEvent *event)
                                     _("Empty file"));
                } else if (file_size < REALLY_SMALL_FILE_SIZE) {
                        entry = rhythmdb_add_import_error_entry (db, event, event->ignore_type);
-                       rhythmdb_entry_cache_metadata (entry);
+                       if (entry != NULL) {
+                               rhythmdb_entry_cache_metadata (entry);
+                       }
                        return TRUE;
                }
        }