wayland/surface: Fix sending preferred buffer transform
Fix an obvious copy paste error that slipped through the cracks. Fortunately it doesn't have a visual impact for well behaving clients but only makes us not hit direct-scanout paths, assuming no other bugs in the stack.
Fixes: f21762ea (wayland: Add support for preferred_buffer_scale/transform)
Closes #3449 (closed)
Edited by Robert Mader