wizards: EffectiveMax & EffectiveMin of TINYINT

http://docs.oracle.com/javase/1.5.0/docs/api/constant-values.html#java.lang.Byte.MIN_VALUE

Change-Id: I702f1354eaddc37e6321c3cdc0126a78945d0754
Reviewed-on: https://gerrit.libreoffice.org/11044
Reviewed-by: Noel Grandin <noelgrandin@gmail.com>
Tested-by: Noel Grandin <noelgrandin@gmail.com>