core: commented prototype of free_/fixup_regexp_none()

- these functions are used only by textops module
- implementation of these functions added to textops

mod_fix.h

@@ -85,9 +85,9 @@ int fixup_uint_uint(void** param, int param_no);
 
 int fixup_regexp_null(void** param, int param_no);
 int fixup_free_regexp_null(void** param, int param_no);
+#if 0
 int fixup_regexp_none(void** param, int param_no);
 int fixup_free_regexp_none(void** param, int param_no);
-#if 0
 /* not implemened yet */
 int fixup_regexpNL_null(void** param, int param_no);
 int fixup_regexpNL_none(void** param, int param_no);