avoid recompilation under WIN CI unless scheduled; get rid of MSVC warnings

Joachim Wuttkerequested to merge
rules into develop
  • Win CI: don't force mkdir build, unless we are in a nightly scheduled run => brings compilation from 10' down to 2'30'')
  • suppress some compiler warnings from 3rdparty code
  • correct specular computations to resolve warnings about size_t
Edited by Joachim Wuttke

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