games-action/battalion: fix build w/ upcoming clang16

Also add missing xorg-proto dep while here.

Closes: https://bugs.gentoo.org/874987
Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

games-action/battalion/battalion-1.4b-r2.ebuild

@@ -1,4 +1,4 @@
-# Copyright 1999-2021 Gentoo Authors
+# Copyright 1999-2022 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 EAPI=8
@@ -21,12 +21,15 @@ RDEPEND="
 	virtual/glu
 	virtual/opengl
 	x11-libs/libX11"
-DEPEND="${RDEPEND}"
+DEPEND="
+	${RDEPEND}
+	x11-base/xorg-proto"
 BDEPEND="virtual/pkgconfig"
 
 PATCHES=(
 	"${FILESDIR}"/${P}-warning.patch
 	"${FILESDIR}"/${P}-fix-build-system.patch
+	"${FILESDIR}"/${P}-clang16.patch
 )
 
 src_prepare() {

games-action/battalion/files/battalion-1.4b-clang16.patch

@@ -0,0 +1,8 @@
+https://bugs.gentoo.org/874987
+--- a/battalion.c
++++ b/battalion.c
+@@ -5471,3 +5471,3 @@
+ 
+-main (int argc, char*argv[])
++int main (int argc, char*argv[])
+     {