Issue #420: Crash: not able to to open Standard measurements tables (dismine/valentina)

New issue 420: Crash: not able to to open Standard measurements tables https://bitbucket.org/valentinateam/valentina/issues/420/crash-not-able-to-to-open-standard

Bettina G.:

The Programm crashes, when I try to open a standard measurement table. With individual is everything ok.

Version: 0.4.0.769b