Enable count to recognize single elements values

[TobiasNx]

Currently if you have a singe element not an array, the count function does not do anything. It would be great if the function would then result in 1 instead.

Currently one has to do something like:

set_array("indexCountHelper[]")
do list(path:"array[]","var":"$i")
    copy_field("$i.a","indexCountHelper[].$append")
    copy_field("indexCountHelper[]","$i.indexPosition")
    if is_array("$i.indexPosition")
        count("$i.indexPosition")
    else
        add_field("$i.indexPosition","1")
    end
end

This is also related to the issue of #621.