games-arcade/xboing: fix build with clang16

Signed-off-by: Ionen Wolkens <ionen@gentoo.org>

games-arcade/xboing/files/xboing-2.4-clang16.patch

@@ -0,0 +1,37 @@
+Ideally would want to enable -DNeedFunctionPrototypes=1
+but it leads to more issues not handled here.
+
+https://bugs.gentoo.org/870412
+--- a/eyedude.c
++++ b/eyedude.c
+@@ -51,2 +51,3 @@
+ #include <stdio.h>
++#include <stdlib.h>
+ #include <math.h>
+--- a/include/intro.h
++++ b/include/intro.h
+@@ -84,2 +84,3 @@
+ void DrawIntroTitle(Display *display, Window window, int x, int y);
++void HandleBlink(Display *display, Window window);
+ #else
+@@ -92,2 +93,3 @@
+ void DoIntroTitle();
++void HandleBlink();
+ #endif
+--- a/include/level.h
++++ b/include/level.h
+@@ -74,2 +74,3 @@
+ void DisplayLevelInfo(Display *display, Window window, u_long level);
++void DisplayLevelNumber(Display *display, Window window, u_long level);
+ void CheckGameRules(Display *display, Window window);
+@@ -113,2 +114,3 @@
+ void DisplayLevelInfo();
++void DisplayLevelNumber();
+ void CheckGameRules();
+--- a/main.c
++++ b/main.c
+@@ -231,3 +231,3 @@
+ {
+-	static oldx = 0;
++	static int oldx = 0;
+ 	int x, y;

games-arcade/xboing/xboing-2.4-r4.ebuild

@@ -17,8 +17,11 @@ KEYWORDS="amd64 ~x86"
 
 RDEPEND="
 	acct-group/gamestat
+	x11-libs/libX11
 	x11-libs/libXpm"
-DEPEND="${RDEPEND}"
+DEPEND="
+	${RDEPEND}
+	x11-base/xorg-proto"
 BDEPEND="
 	app-text/rman
 	sys-devel/gcc
@@ -29,6 +32,7 @@ PATCHES=(
 	"${WORKDIR}"/${P}-debian.patch
 	"${FILESDIR}"/${P}-buffer.patch
 	"${FILESDIR}"/${P}-sleep.patch
+	"${FILESDIR}"/${P}-clang16.patch
 )
 
 src_prepare() {