vertex: usage of uninitialized field

Hey everyone 🙂👋

I was trying to build the lib from v3.7.1 sources and I faced this issue/warning, is it something expected ?
Don't hesitate to tell me if I can help on this 👍

$cmake . -DCMAKE_BUILD_TYPE=Release -DBUILD_SHARED_LIBS=1 -DBUILD_TESTING=0 -DBUILD_GENERATORS=0 -DBUILD_BENCHMARKS=0 -DBUILD_FILTERS=0 -DENABLE_LINTING=0 -DENABLE_DOCS=0 -DENABLE_COVERAGE=0
...skipped...
...skipped...
...skipped...
/tmp/h3-3.7.1/src/h3lib/lib/vertex.c: In function 'vertexRotations':
/tmp/h3-3.7.1/src/h3lib/lib/vertex.c:80:47: warning: 'dirFaces.faces[3]' may be used uninitialized in this function [-Wmaybe-uninitialized]
         if (cellLeadingDigit == JK_AXES_DIGIT &&
             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
             fijk.face ==
             ~~~~~~~~~~~~
                 dirFaces.faces[IK_AXES_DIGIT - DIRECTION_INDEX_OFFSET]) {
                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/h3-3.7.1/src/h3lib/lib/vertex.c:85:54: warning: 'dirFaces.faces[1]' may be used uninitialized in this function [-Wmaybe-uninitialized]
         } else if (cellLeadingDigit == IK_AXES_DIGIT &&
                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
                    fijk.face ==
                    ~~~~~~~~~~~~
                        dirFaces.faces[JK_AXES_DIGIT - DIRECTION_INDEX_OFFSET]) {
                        ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Reproduce the warning with the CMake command shown in the issue, then inspect src/h3lib/lib/vertex.c, especially vertexRotations and the dirFaces.faces accesses at the reported lines. Determine whether the warning reflects a real uninitialized value or a compiler-analysis issue, and rerun the same build to verify the warning is addressed.