Changed name of items in PVCDO keyword.
Merge pull request #225 from joakim-hove/fix-PVCDO

Changed name of items in PVCDO keyword.
Fixed typo in item name
fix spurious GCC warnings

The root cause are pretty (too?) strict flags w.r.t. compiler
warnings. In this case, the offenders are "-Wmissing-declarations" and
"-Wtype-limits".
Merge pull request #227 from andlaus/fix_gcc_warnings

fix spurious GCC warnings