Initalize vars claimed by valgrind / write classname instead 'PVR' in…

[ghost]

… PVRChannelGroups:LOGDEBUG to make debugging easier

I wasn't able to read my valgrind log because of the mass of messages (as I remember GUIShader was the worst one), I have eliminated all the others and now it looks clean.

[hudokkow]

Thanks, looks good.
jenkins build this please

[mkortstiege]

Not sure about the platinum change. Is this our code or should it be send upstream? @Montellese mind having a look?

[Paxxi]

@mkortstiege Upstreaming can be looked at but no reason to block this pr.

[MilhouseVH]

Confirming notification problem reported by @Uukrull.

Easy way to reproduce (change port 8080 to whatever your webserver is using):

curl --data-binary '{"jsonrpc": "2.0", "params": {"message": "This is the message", "image": "error", "displaytime": 5000, "title": "This Is the title"}, "method": "GUI.ShowNotification", "id": "libNotification"}' -H 'content-type:application/json;' 'http://localhost:8080/jsonrpc'

should produce a notification with title "This Is the title" and message "This is the message" text, and Error icon, but currently there is no text.