thodg/libgit2

diff --git a/src/cache.c b/src/cache.c
index 1f5b887..edd3a47 100644
--- a/src/cache.c
+++ b/src/cache.c
@@ -41,6 +41,7 @@ void git_cache_free(git_cache *cache)
 			git_cached_obj_decref(cache->nodes[i], cache->free_obj);
 	}
 
+	git_mutex_free(&cache->lock);
 	git__free(cache->nodes);
 }