Fix MSVC warnings about scopes.

qddshandler.cpp(483) : warning C4258: 'i' : definition from the for loop is ignored; the definition from the enclosing scope is used
        qddshandler.cpp(477) : definition of 'i' ignored
        qddshandler.cpp(467) : definition of 'i' used
qddshandler.cpp(486) : warning C4258: 'i' : definition from the for loop is ignored; the definition from the enclosing scope is used
        qddshandler.cpp(477) : definition of 'i' ignored
        qddshandler.cpp(467) : definition of 'i' used

Change-Id: Ib911578900f012db20d9e50bdffa5d1ca9896a7e
Reviewed-by: Ivan Komissarov <ABBAPOH@me.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>