DropPlugin: modernize OpenFile/_lwrite/_lclose API
DropPlugin: modernize OpenFile/_lwrite/_lclose API

OK, OK, they are compatible with 16 bits windows ;)
But these are not recommended any more especially if we want to go toward UNICODE paths everywhere.

OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm,timfel/squeakvm,timfel/squeakvm,OpenSmalltalk/vm,timfel/squeakvm,OpenSmalltalk/vm,OpenSmalltalk/vm,OpenSmalltalk/vm,timfel/squeakvm