games/nethack32: Fix build with llvm16

Approved by:	portmgr (blanket)
Sponsored by:	The FreeBSD Foundation

games/nethack32/Makefile

@@ -40,6 +40,10 @@ PLIST_SUB+=	HACKLINK=""
 PLIST_SUB+=	HACKLINK="@comment "
 .endif
 
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400091 || ( ${OSVERSION} >= 1302507 && ${OSVERSION} < 1400000 ))
+CFLAGS+=	-Wno-error=incompatible-function-pointer-types
+.endif
+
 post-patch:
 .for f in include/config.h sys/unix/Makefile.top sys/unix/Makefile.doc
 	@${REINPLACE_CMD} -e 's|%%HACKNAME%%|${HACKNAME}|g' \