gvariant: Ensure GVS.depth is initialised
When byteswapping the depth was accidentally left uninitialised.
Coverity CID: #1430636 Signed-off-by: Philip Withnall withnall@endlessm.com
When byteswapping the depth was accidentally left uninitialised.
Coverity CID: #1430636 Signed-off-by: Philip Withnall withnall@endlessm.com