On rare occasion, the second preamble in a resource file may be empty. This PR changes the verification to ignore zero values in the second preamble.
Additionally, it verifies that the first preamble is not zero, which would otherwise be successfully parsed with an odd result.
On rare occasion, the second preamble in a resource file may be empty. This PR changes the verification to ignore zero values in the second preamble. Additionally, it verifies that the first preamble is not zero, which would otherwise be successfully parsed with an odd result.
(Fixes #32)