x11-toolkits/open-motif*: fix build with clang 16

Clang 16 has a new error about incompatible function types, which shows
up when building x11-toolkits/open-motif:

  WmError.c:134:24: error: incompatible function pointer types passing 'void (char *)' to parameter of type 'void (*)(String) __attribute__((noreturn))' (aka 'void (*)(char *) __attribute__((noreturn))') [-Wincompatible-function-pointer-types]
      XtSetErrorHandler (WmXtErrorHandler);
                         ^~~~~~~~~~~~~~~~
  /usr/local/include/X11/Intrinsic.h:1776:1: note: passing argument to parameter here
  );
  ^

In this case the declaration of the callback function for
XtSetErrorHandler() shoud have a noreturn attribute, specifically using
the _X_NORETURN macro.

PR:		271425

x11-toolkits/open-motif-devel/files/patch-clients_mwm_WmError.h

@@ -0,0 +1,11 @@
+--- clients/mwm/WmError.h.orig	2017-08-17 00:38:43 UTC
++++ clients/mwm/WmError.h
+@@ -32,7 +32,7 @@ extern int WmXIOErrorHandler (Display *display);
+ extern void WmInitErrorHandler (Display *display);
+ extern int WmXErrorHandler (Display *display, XErrorEvent *errorEvent);
+ extern int WmXIOErrorHandler (Display *display);
+-extern void WmXtErrorHandler (char *message);
++extern void WmXtErrorHandler (char *message) _X_NORETURN;
+ extern void WmXtWarningHandler (char *message);
+ extern void Warning (char *message);
+ #ifndef NO_MESSAGE_CATALOG

x11-toolkits/open-motif/files/patch-clients_mwm_WmError.h

@@ -0,0 +1,11 @@
+--- clients/mwm/WmError.h.orig	2017-08-17 00:38:43 UTC
++++ clients/mwm/WmError.h
+@@ -32,7 +32,7 @@ extern int WmXIOErrorHandler (Display *display);
+ extern void WmInitErrorHandler (Display *display);
+ extern int WmXErrorHandler (Display *display, XErrorEvent *errorEvent);
+ extern int WmXIOErrorHandler (Display *display);
+-extern void WmXtErrorHandler (char *message);
++extern void WmXtErrorHandler (char *message) _X_NORETURN;
+ extern void WmXtWarningHandler (char *message);
+ extern void Warning (char *message);
+ #ifndef NO_MESSAGE_CATALOG