x11-misc/devilspie2: add missing gtk+:3[X] usedep

(note that this cannot work on wayland, thus being a hard dependency)

Closes: https://bugs.gentoo.org/957651
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

x11-misc/devilspie2/devilspie2-0.45-r1.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2024 Gentoo Authors
+# Copyright 1999-2025 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -18,7 +18,7 @@ REQUIRED_USE="${LUA_REQUIRED_USE}"
 RDEPEND="
 	${LUA_DEPS}
 	dev-libs/glib:2
-	x11-libs/gtk+:3
+	x11-libs/gtk+:3[X]
 	x11-libs/libX11
 	x11-libs/libXinerama
 	x11-libs/libXrandr