fix grafts and shallowarray memory leaks

src/libgit2/grafts.c

@@ -43,6 +43,9 @@ int git_grafts_from_file(git_grafts **out, const char *path)
 	git_grafts *grafts = NULL;
 	int error;
 
+	if (*out)
+		return git_grafts_refresh(*out);
+
 	if ((error = git_grafts_new(&grafts)) < 0)
 		goto error;
 

src/libgit2/remote.c

@@ -2150,6 +2150,11 @@ void git_remote_free(git_remote *remote)
 		remote->transport = NULL;
 	}
 
+	if (remote->nego.shallow_roots) {
+		git_array_clear(remote->nego.shallow_roots->array);
+		git__free(remote->nego.shallow_roots);
+	}
+
 	git_vector_free(&remote->refs);
 
 	free_refspecs(&remote->refspecs);
@@ -2164,8 +2169,6 @@ void git_remote_free(git_remote *remote)
 	free_heads(&remote->local_heads);
 	git_vector_free(&remote->local_heads);
 
-	git_shallowarray_free((remote->nego).shallow_roots);
-
 	git_push_free(remote->push);
 	git__free(remote->url);
 	git__free(remote->pushurl);

src/libgit2/repository.c

@@ -3346,13 +3346,11 @@ int git_repository__shallow_roots(git_array_oid_t *out, git_repository *repo) {
 	if (!repo->shallow_grafts && (error = load_grafts(repo)) < 0)
 		return error;
 
-	if ((error = git_grafts_refresh(repo->shallow_grafts)) < 0) {
+	if ((error = git_grafts_refresh(repo->shallow_grafts)) < 0)
 		return error;
-	}
 
-	if ((error = git_grafts_get_oids(out, repo->shallow_grafts)) < 0) {
+	if ((error = git_grafts_get_oids(out, repo->shallow_grafts)) < 0)
 		return error;
-	}
 
 	return 0;
 }

src/libgit2/transports/smart.c

@@ -510,9 +510,3 @@ int git_shallowarray_remove(git_shallowarray *array, git_oid *oid)
 	/* no git_array_remove… meh */
 	return -1;
 }
-
-void git_shallowarray_free(git_shallowarray *array)
-{
-	git_array_clear(array->array);
-	git__free(array);
-}

src/libgit2/transports/smart.h

@@ -203,6 +203,4 @@ struct git_shallowarray {
 	git_array_oid_t array;
 };
 
-void git_shallowarray_free(git_shallowarray *array);
-
 #endif