x11/xpostit: explicitly cast integer to pointer to fix build with clang 15

The callback takes a pointer to be able to pass arbitrary data, but
instead of allocating an int and passing a pointer to it, the code
jams the int directly into the pointer for an int -> pointer -> int
roundtrip.  Problem reported by and discussed with jca@.

Fix implicit function declarations.

x11/xpostit/Makefile

@@ -2,7 +2,7 @@ COMMENT=	PostIt (R) messages onto your X11 screen
 
 DISTNAME=	xpostit3.3.1
 PKGNAME=	xpostit-3.3.1
-REVISION=	2
+REVISION=	3
 CATEGORIES=	x11
 
 MASTER_SITES=	${MASTER_SITE_R5CONTRIB}

x11/xpostit/patches/patch-menu_c

@@ -0,0 +1,12 @@
+Index: menu.c
+--- menu.c.orig
++++ menu.c
+@@ -120,7 +120,7 @@ CreateMenuWidget()
+ 					      smeBSBObjectClass, menuwidget,
+ 					      NULL, 0);
+ 
+-		XtAddCallback(entry, XtNcallback, HandleMenuSelection, i);
++		XtAddCallback(entry, XtNcallback, HandleMenuSelection, (XtPointer)i);
+ 	}
+ 		
+ 	XawSimpleMenuAddGlobalActions(appcontext);

x11/xpostit/patches/patch-note_c

@@ -0,0 +1,46 @@
+Index: note.c
+--- note.c.orig
++++ note.c
+@@ -97,6 +97,7 @@ static char	*RCSid = "$Header: /home/harbor/davy/stuff
+ #include <X11/Intrinsic.h>
+ #include <X11/Xaw/AsciiText.h>
+ #include <X11/Xaw/Command.h>
++#include <X11/Xaw/Dialog.h>
+ #include <X11/Xaw/Form.h>
+ #include <X11/Shell.h>
+ #include <sys/param.h>
+@@ -105,7 +106,10 @@ static char	*RCSid = "$Header: /home/harbor/davy/stuff
+ #else
+ #include <sys/dir.h>
+ #endif
++#include <sys/stat.h>
+ #include <stdio.h>
++#include <stdlib.h>
++#include <unistd.h>
+ 
+ #include "xpostit.h"
+ #include "vroot.h"
+@@ -135,6 +139,7 @@ static void		CancelDestroy();
+ static void		ConfirmDestroy();
+ static void		MakeNoteWidget();
+ static void		NoteProtocolsHandler();
++static void		GetNotePosition();
+ 
+ static XtEventHandler	StructureNotifyHandler();
+ 
+@@ -238,7 +243,6 @@ LoadSavedNotes()
+ {
+ 	DIR *dp;
+ 	FILE *fp;
+-	char *realloc();
+ 	register PostItNote *pn;
+ #if defined(USG) || defined(SYSV) || defined(SVR4)
+ 	register struct dirent *d;
+@@ -1169,6 +1173,7 @@ NoteIndex()
+  *
+  *		     Thanks to Stewart Levin for the original code.
+  */
++static void
+ GetNotePosition(w, x, y)
+ int *x, *y;
+ Widget w;

x11/xpostit/patches/patch-util_c

@@ -0,0 +1,31 @@
+Index: util.c
+--- util.c.orig
++++ util.c
+@@ -44,8 +44,10 @@ static char	*RCSid = "$Header: /home/harbor/davy/stuff
+ #include <X11/StringDefs.h>
+ #include <X11/Intrinsic.h>
+ #include <sys/param.h>
+-#include <stdio.h>
+ #include <pwd.h>
++#include <stdio.h>
++#include <stdlib.h>
++#include <unistd.h>
+ 
+ #include "xpostit.h"
+ 
+@@ -72,7 +74,6 @@ ByeBye()
+ void
+ SetNoteDir()
+ {
+-	char *getenv();
+ 	char *home, *s;
+ 	struct passwd *pwd;
+ 	char fname[MAXPATHLEN];
+@@ -129,7 +130,6 @@ char *
+ SafeAlloc(nbytes)
+ register int nbytes;
+ {
+-	char *malloc();
+ 	register char *s;
+ 
+ 	if ((s = malloc(nbytes)) == NULL) {

x11/xpostit/patches/patch-xpostit_h

@@ -0,0 +1,25 @@
+Index: xpostit.h
+--- xpostit.h.orig
++++ xpostit.h
+@@ -162,8 +162,10 @@ extern	Widget plaidwidget;
+  * Function declarations.
+  */
+ char	*SafeAlloc();
++char	*GetNoteTitle();
+ 
+ void	ByeBye();
++void	SetNoteDir();
+ void	ConfirmIt();
+ void	MakeNewNote();
+ void	ClearConfirm();
+@@ -173,8 +175,10 @@ void	ShowAllNotes();
+ void	RaiseAllNotes();
+ void	LowerAllNotes();
+ void	CreateNewNote();
++void	LoadSavedNotes();
+ void	CreateMenuWidget();
+ void	CreatePlaidWidget();
++void	ClearTitle();
+ 
+ #if defined(USG) || defined(SYSV) || defined(SVR4)
+ #define rindex		strrchr