wayland: Minor whitespace cleanup

Co-authored-by: Frank Praznik <frank.praznik@gmail.com>

src/video/wayland/SDL_waylandevents_c.h

@@ -21,7 +21,6 @@
 
 #include "SDL_internal.h"
 
-
 #ifndef SDL_waylandevents_h_
 #define SDL_waylandevents_h_