[REG] QODBC and Firebird driver manager - floating point columns

Created a database in Firebird with one table and two columns: one of type "double precision", other of type "float".
Inserted value of 1 into the float field and 2 into the double field.
Created a small program to read that record from the database and print the results.

Expected to see:
Result of 1 from the float field and two from the double precision field.

Got instead:
Numeric garbage, like if overflowed the floating point.

This is a regression from Qt 4.4.