rangetypes_spgist.c: In function 'spg_range_quad_inner_consistent':
rangetypes_spgist.c:559:29: warning: comparison between pointer and zero character constant [-Wpointer-compare]
      if (in->traversalValue != (Datum) 0)
                             ^~
rangetypes_spgist.c:559:10: note: did you mean to dereference the pointer?
      if (in->traversalValue != (Datum) 0)
          ^