Quiet compiler warning/errors.

[abellgithub]

@wonder-sk : Does the (void)pointId; quiet things for you?

[wonder-sk]

• Yes (void)pointId; quiets that unused variable warning...

• There is one unused variable warning left:

[6/17] Building CXX object src/providers/pdal/CMakeFiles/untwine.dir/__/__/__/external/untwine/epf/Grid.cpp.o
../external/untwine/epf/Grid.cpp: In member function ‘int untwine::epf::Grid::calcLevel()’:
../external/untwine/epf/Grid.cpp:45:12: warning: unused variable ‘limit’ [-Wunused-variable]
   45 |     double limit = (MaxPointsPerNode / 1000000.0);
      |            ^~~~~

• I have realized I did not do a full rebuild and there is actually one more warning turned into an error when I compile in Release mode:

../untwine/ProgressWriter.cpp: In member function ‘void untwine::ProgressWriter::writeMessage(uint32_t, const string&)’:
../untwine/ProgressWriter.cpp:65:12: error: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Werror=unused-result]
   65 |     ::write(m_progressFd, &percent, sizeof(percent));
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../untwine/ProgressWriter.cpp:67:12: error: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Werror=unused-result]
   67 |     ::write(m_progressFd, &ssize, sizeof(ssize));
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
../untwine/ProgressWriter.cpp:68:12: error: ignoring return value of ‘ssize_t write(int, const void*, size_t)’, declared with attribute warn_unused_result [-Werror=unused-result]
   68 |     ::write(m_progressFd, message.data(), ssize);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
cc1plus: all warnings being treated as errors

[wonder-sk]

Looking good - compiles fine without errors/warnings!