[BUG] DSpellcheck crash

[un-lo-so]

The dictionary than I use is stored in the Libreoffice directory, so if I try to add a new word a warning message box appear and inform me that "Notepad++ have no access to writing into dictionary directory". So far so good but when I click on "Ok" button notepad++ suddenly crash.

Steps To Reproduce:
Setup DSpellcheck to use dictionary in a directory without write access for notepad++
Type a word with an error
Click with mouse right-button on the word
Click to "add to Dictionary"

Current Behaviour:
Notepad++ suddenly crash

Expected Behaviour:
Notepad shouldn't suddenly crash

see also: notepad-plus-plus/notepad-plus-plus#16598