[Installer] fixed boolean condition
[Installer] fixed boolean condition

It said "if it isn't A or isn't B", which is always true when A ne B. changed
to "if !(it is A|B)" instead. finanalyst++

masak/proto,masak/proto,masak/proto,perl6/modules.perl6.org,perl6/modules.perl6.org,perl6/modules.perl6.org,perl6/modules.perl6.org