issue-#103 bug fix in TextMappers.Scanner

[Josef Templ]

A Scanner with option 'returnViews' but without option 'maskViews' delivers wrong results for masked views.
A proposal for a fix by TemirgaleevEE exists in CPC 1.7 rc6.

Refers to CPC 1.7 rc6 change list number 53.
Refers to oberoncore B23.

For the issue see http://redmine.blackboxframework.org/issues/103.

For the changes see http://redmine.blackboxframework.org/projects/blackbox/repository/diff?utf8=%E2%9C%93&rev=c718a8b0b9dc34808ee190d5fcf90823f11ad31f&rev_to=abad1586fe76004193c9681ccf16c8693ed02c62.

The changes are exactly as proposed by TemirgaleevEE in CPC 1.7 rc6.

- Josef