GDKvmtrim(): properly cast BBPtrim() argument to size_t
GDKvmtrim(): properly cast BBPtrim() argument to size_t

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