Merge pull request #1673 from Idclip/stencil_minmax #1614

Job	Run time
linux-nanovdb:cxx:g++-Release	7m 46s
linux-nanovdb:cxx:g++-Debug	6m 7s
linux-nanovdb:cxx:clang++-Release	8m 19s
linux-nanovdb:cxx:clang++-Debug	5m 58s
macos-nanovdb (macos-11, clang++, Release)	14m 37s
macos-nanovdb (macos-11, clang++, Debug)	9m 47s
nanovdb-lite	2m 3s
windows-nanovdb (x64-windows-static, Release, -A x64 -G \"Visual Studio 17 2022\" -DOPENVDB_CORE_...	25m 18s
windows-nanovdb (x64-windows-static, Debug, -A x64 -G \"Visual Studio 17 2022\" -DOPENVDB_CORE_SH...	23m 4s
windows-nanovdb (x64-windows, Release, -A x64 -G \"Visual Studio 17 2022\" -DOPENVDB_CORE_STATIC=...	23m 57s
windows-nanovdb (x64-windows, Debug, -A x64 -G \"Visual Studio 17 2022\" -DOPENVDB_CORE_STATIC=OFF)	24m 25s
	2h 31m 21s

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