#3691 Certain characters in the query cause crash

[Friedrich]

The software crashes with an integer overflow when you insert the character "ä" with the hex encoding "61 cc 88". The common utf-8 encoded character "ä" with "C3 A4" [hex] works fine.

Try yourself and insert the following lines into the query textarea:

-- ä  <- no error
-- ä  <- produces integer overflow, software crashes