[fix] fix build with C4CORE_NO_FAST_FLOAT and a typo

[mbs-c]

See also biojppm/c4core#42.

Fixes #162.

[codecov]

Codecov Report

Merging #163 (d1410c3) into master (82d96e2) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #163   +/-   ##
=======================================
  Coverage   96.20%   96.20%           
=======================================
  Files          63       63           
  Lines       12241    12241           
=======================================
  Hits        11777    11777           
  Misses        464      464           

Impacted Files	Coverage Δ
src/c4/yml/tree.cpp	94.43% <ø> (ø)
src/c4/yml/tree.hpp	98.85% <ø> (ø)

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[biojppm]

To benefit from the fixes that you added in c4core, you should also update the c4core submodule to the commit after MR biojppm/c4core#42 . If you wish to proceed otherwise, just let me know and I will then merge.

[mbs-c]

I wasn't sure whether I should do that myself, but if you're fine with it, I'll add another commit so that this PR is logically complete.

[biojppm]

Thanks!