fix type reference in metatype system
fix type reference in metatype system

since everything was namespaced we need to use the namespace to make sure
qmeta knows which Client* we are talking about

this should be the only occurrence of this problem based on a quick look
through the headers

locusf/plasma-pa,locusf/plasma-pa,locusf/plasma-pa,locusf/plasma-pa,locusf/plasma-pa