examples: ls-files: build file list with array

examples/ls-files.c

@@ -109,8 +109,8 @@ static int print_paths(ls_options *opts, git_index *index)
 int main(int argc, char *argv[])
 {
 	ls_options opts;
-	git_repository *repo;
-	git_index *index;
+	git_repository *repo = NULL;
+	git_index *index = NULL;
 	const git_index_entry *entry;
 	size_t entry_count;
 	size_t i = 0;
@@ -121,10 +121,10 @@ int main(int argc, char *argv[])
 
 	git_libgit2_init();
 
-	if ((error = git_repository_open_ext(&repo, ".", 0, NULL)) != 0)
+	if ((error = git_repository_open_ext(&repo, ".", 0, NULL)) < 0)
 		goto cleanup;
 
-	if ((error = git_repository_index(&index, repo)) != 0)
+	if ((error = git_repository_index(&index, repo)) < 0)
 		goto cleanup;
 
 	/* if there are files explicitly listed by the user, we need to treat this command differently */