Review Request: Crash fix: Avoid a dangling pointer when keyPressEvent changes the cursor to a different block.

[Andrew Fuller]

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http://git.reviewboard.kde.org/r/103108/
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Review request for Calligra.


Description
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If the layout is fetched before keyPressEvent it may be deleted before we call setPreeditArea and will segfault.

This is a relatively special case that many people will never see.  But we don't want any crashes, do we?

To reproduce:
* enable CJK input in order to utilize the preedit area
* In a new document type "lorem<enter>ipsum" followed by a few pre-edit characters.  For example if using chewing you could type ji3g4
* Do *not* commit the text (don't hit <enter>)
* Select all (ctrl-A) and change the font size
* Cross your fingers you didn't lose too much of your data


Diffs
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  plugins/textshape/TextTool.cpp c4d64ef 

Diff: http://git.reviewboard.kde.org/r/103108/diff/diff


Testing
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Thanks,

Andrew Fuller

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