KexiDB MySQL Driver: fixed crash when inserting incomplete rows

KexiDB
*MySQL Driver
**fixed crash in prepared statement execution for inserting data when number of items to insert is smaller than expected; this case could be found when importing CSV data in Kexi with fewer columns specified than expected

CCBUG:279980
CCBUG:254068

FIXED-IN: 2.4 (Calligra 2.4)