Kwrite shouldn't try reading deleted file while saving it

Binary package hint: kate

Kwrite shouldn't try reading deleted file while saving it.

Just now, I lost an important text document because of this bug.

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Try reproduce these steps:

#1. Open konsole
#2. Create a simple text file.

$ seq 1 20 > test.txt

#3. Open the new file with kwrite (in background).

$ kwrite test.txt &

#4. Remove the file while kwrite is open.

$ rm -f test.txt

#5. Activate kwrite's window. It says the file was removed from disc and asks for saving it again.

#6. Click "Save file as" and choose a folder and a name for the new file.

#7. Click "Save" on dialog box. It says the file couldn't be read from disc and loses the unsaved content.

Using Ubuntu Gutsy, kate=4:3.5.7-1ubuntu15