fixed issues 130, 132, 134 to 137

[hoene]

No description provided.

[codecov]

Codecov Report

Merging #146 (0b250b6) into master (9be9888) will increase coverage by 0.15%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #146      +/-   ##
==========================================
+ Coverage   85.01%   85.16%   +0.15%     
==========================================
  Files          36       36              
  Lines        3303     3304       +1     
==========================================
+ Hits         2808     2814       +6     
+ Misses        495      490       -5     

Impacted Files	Coverage Δ
src/hdf/dataobject.c	89.06% <ø> (+0.52%)	⬆️
src/hdf/btree.c	97.72% <100.00%> (ø)
src/hdf/fractalhead.c	79.29% <100.00%> (+0.08%)	⬆️
src/hrtf/check.c	90.32% <100.00%> (ø)
src/hrtf/loudness.c	96.15% <100.00%> (ø)
src/hrtf/tools.c	91.08% <100.00%> (ø)
src/hrtf/kdtree.c	92.92% <0.00%> (-0.89%)	⬇️
src/hrtf/lookup.c	93.22% <0.00%> (+1.69%)	⬆️
src/hdf/gunzip.c	93.75% <0.00%> (+12.50%)	⬆️

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