Hopefully the final fix for VALconvert.  Casting from a narrower built-in type to a wider one didn't clear all the bits.
Hopefully the final fix for VALconvert.  Casting from a narrower
built-in type to a wider one didn't clear all the bits.

zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb,zyzyis/monetdb