Two users of virEventGLibAddSocketWatch care about the GSource
it returns.
The other three free it by assigning it to an autofreed variable.
Mark them with G_GNUC_UNUSED to make this obvious to the reader
and the compiler.
Signed-off-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>