don't make NF_SUBSECTOR available to Lua either unless HAVE_LUA_SEGS is defined

src/dehacked.c

@@ -7217,8 +7217,10 @@ struct {
 	{"FF_COLORMAPONLY",FF_COLORMAPONLY},       ///< Only copy the colormap, not the lightlevel
 	{"FF_GOOWATER",FF_GOOWATER},               ///< Used with ::FF_SWIMMABLE. Makes thick bouncey goop.
 
+#ifdef HAVE_LUA_SEGS
 	// Node flags
 	{"NF_SUBSECTOR",NF_SUBSECTOR}, // Indicate a leaf.
+#endif
 
 	// Angles
 	{"ANG1",ANG1},