Patch coming up...
Created attachment 189172 [details, diff] libsndfile-1.0.19 common.h patch
Created attachment 189180 [details, diff] ... and also fix test-suite The test-suite eventually fails with: float_scaled_test : vorbis.oga .............. Line 231: Actual SNR (-26.3) > target SNR (-31.0). ... but this is a significant way in.
patch applied, thanks!