(backport 21.1) randr: fix wrong call to RRGetScreenResources() in swapped case
ProcRRGetScreenResources() vs. RRGetScreenResourcesCurrent() have different semantics - this also must be followed in byte-swapped case.
Fixes: fc708394 - Add server support for RRGetScreenResourcesCurrent Signed-off-by: Enrico Weigelt, metux IT consult info@metux.net