Merge pull request #607 from nulltoken/fix/file-close-on-error

test helpers: Fix file close on error

tests/test_helpers.c

@@ -197,6 +197,7 @@ int copy_file(const char *src, const char *dst)
 
 cleanup:
 	git_buf_free(&source_buf);
+	if (dst_fd >= 0)
 		p_close(dst_fd);
 
 	return error;