[bug] Saving AudioFile<double> as 32-bit WAV file (results in loud, scratchy noise)

[gitelope]

When an AudioFile<double> is saved to 32-bit WAV, the result is loud, scratchy noise.

This works for AudioFile<float>s but not for AudioFile<double>s:
Line 998 in AudioFile.h: sampleAsInt = (int32_t) reinterpret_cast<int32_t&> (samples[channel][i]);

(By the way, thanks for sharing your code! I'm in the process of replacing libsndfile in my audio library before making it public with a permissive license and I'm digging this single-header C++ library of yours.)

[gitelope]

pull request

[adamstark]

Thanks again for this - merged in now, so I'll close this issue. Really appreciate the contribution!