Some ODBC drivers do not properly handle SQL_NO_DATA and therefore
decimal values returned with HighPrecision are cut off because the
decimal point is not taken into account.
Fixes: QTBUG-73286
Pick-to: 6.0 5.15 5.12
Change-Id: I905c947b4d0266a3245d5735300300ca00f77480
Reviewed-by: Andy Shaw <andy.shaw@qt.io>
Reviewed-by: Christian Ehrlicher <ch.ehrlicher@gmx.de>