initialize hexahedron count in mesh conversion
initialize hexahedron count in mesh conversion

hexahedra are new to mds, so this was missed
and creating uninit values

YetAnotherMinion/core,YetAnotherMinion/core,yangf4/core,yangf4/core,yangf4/core,yangf4/core,YetAnotherMinion/core,YetAnotherMinion/core,yangf4/core,YetAnotherMinion/core