patch 9.1.1485: missing Wayland clipboard support

Problem:  missing Wayland clipboard support
Solution: make it work (Foxe Chen)

fixes: #5157
closes: #17097

Signed-off-by: Foxe Chen <chen.foxe@gmail.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/proto.h b/src/proto.h
index 8282dc3..28cb809 100644
--- a/src/proto.h
+++ b/src/proto.h
@@ -177,6 +177,9 @@
 #  include "profiler.pro"
 # endif
 # include "quickfix.pro"
+#ifdef FEAT_WAYLAND
+# include "wayland.pro"
+#endif
 # include "regexp.pro"
 # include "register.pro"
 # include "scriptfile.pro"