D12354: Fix segfault in key settings menu when worksheet not open

[Nikita Sirgienko]

This revision was automatically updated to reflect the committed changes.
Closed by commit R55:af538e222e83: Fix segfault in key settings menu when worksheet not open (authored by sirgienko).

REPOSITORY
  R55 Cantor

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D12354?vs=32570&id=32776

REVISION DETAIL
  https://phabricator.kde.org/D12354

AFFECTED FILES
  src/cantor.cpp

To: sirgienko, #cantor, asemke
Cc: #cantor, #kde_edu, narvaez, apol
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