OptimizedLength was 7.
But only indices 6 where initialized,
and only indices 0..4 are ever used in optimizedCurrentTokenSource2-6

Change-Id: Ida5acdb9a00d1443e43af021c0f4f91411097efc
Signed-off-by: Joerg Kubitz <jkubitz-eclipse@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/jdt/eclipse.jdt.core/+/184839
Reviewed-by: Gayan Perera <gayanper@gmail.com>
Tested-by: Gayan Perera <gayanper@gmail.com>
Tested-by: JDT Bot <jdt-bot@eclipse.org>