Fix #4465: spall Quadrics correctly.

Many thanks to Jeff Hammond for noticing.

cmr=v1.8:reviewer=ompi-rm1.8
Do not include inttypes.h directly in Open MPI. Use opal_stdint.h instead.

This commit should finish the work started for #869. Closing that ticket
with this commit.

Closes #869

cmr=v1.8.1:reviewer=jsquyres