Review Request 129910: Avoid warning when opening GotoPageDialog

[Oliver Sander]

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https://git.reviewboard.kde.org/r/129910/
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Review request for Okular.


Repository: okular


Description
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I recently started to get the console warning

QLayout: Attempting to add QLayout "" to Okular::GotoPageDialog "", which already has a layout

whenever I opened the Goto-Page dialog.  The patch fixes the issue for me.


Diffs
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  part.cpp fff1ffcc 

Diff: https://git.reviewboard.kde.org/r/129910/diff/


Testing
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Warning is gone.
Dialog still looks the same.


Thanks,

Oliver Sander

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