fuzzers: don't use deprecated types

fuzzers/objects_fuzzer.c

@@ -25,7 +25,7 @@ int LLVMFuzzerInitialize(int *argc, char ***argv)
 
 int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
 {
-	const git_otype types[] = {
+	const git_object_t types[] = {
 		GIT_OBJECT_BLOB, GIT_OBJECT_TREE, GIT_OBJECT_COMMIT, GIT_OBJECT_TAG
 	};
 	git_object *object = NULL;