package/mpv: wayland support needs wayland-protocols

The dependency for wayland-protocols was added with version 0.28.0:
https://github.com/mpv-player/mpv/commit/68f9ee7e0b3fdddfa42fa11a15d9ae84460d5e19#diff-dc6134e3d3c869a052520d86f46371dc

Fixes:
http://autobuild.buildroot.net/results/d5c/d5c5a31bc422defdd64ff0b0ca975bcd605f22be/
Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>

package/mpv/Config.in

@@ -8,6 +8,7 @@ config BR2_PACKAGE_MPV
 	select BR2_PACKAGE_FFMPEG
 	select BR2_PACKAGE_FFMPEG_SWSCALE
 	select BR2_PACKAGE_ZLIB
+	select BR2_PACKAGE_WAYLAND_PROTOCOLS if BR2_PACKAGE_WAYLAND
 	# Select xkbcommon for wayland to avoid being mysterious
 	select BR2_PACKAGE_LIBXKBCOMMON if BR2_PACKAGE_WAYLAND
 	# Select all necessary X11 dependencies if X.org is enabled

package/mpv/mpv.mk

@@ -197,7 +197,7 @@ endif
 # wayland support
 ifeq ($(BR2_PACKAGE_WAYLAND),y)
 MPV_CONF_OPTS += --enable-wayland
-MPV_DEPENDENCIES += libxkbcommon wayland
+MPV_DEPENDENCIES += libxkbcommon wayland wayland-protocols
 else
 MPV_CONF_OPTS += --disable-wayland
 endif