added non-closing blocks->fd which returns the last non-bvec | null value as success to be able to use it elsewhere for direct io
added non-closing blocks->fd which returns the last non-bvec | null value as success to be able to use it elsewhere for direct io

yuriy-chumak/OL,aisamanra/owl-lisp,aisamanra/owl-lisp,yuriy-chumak/OL,aisamanra/owl-lisp,yuriy-chumak/OL,aoh/owl-lisp,yuriy-chumak/OL,aoh/owl-lisp,aoh/owl-lisp,yuriy-chumak/OL,yuriy-chumak/OL