Make paralysis intefere with seduction attempts

tinklebear on IRC noticed that a hero paralyzed by a floating eye was
still "charmed" and capable of "removing her armor" as part of a nymph's
theft attack.  The same thing was true of foocubus seduction: a
paralyzed hero was still able to respond to the questions about whether
particular pieces of armor should be removed (and also do whatever else
may be involved in a successful attack...).

I think paralysis should prevent both those things.  Nymph theft will
still work, unless she needs the hero's active cooperation in removing a
bulky piece of armor.  Foocubus attacks will be prevented entirely by
paralysis, making it interfere like unconsciousness already does.

Apply a similar constraint to hero vs monster seduction, as well.

src/uhitm.c

@@ -1764,7 +1764,7 @@ steal_it(struct monst *mdef, struct attack *mattk)
 
     /* look for worn body armor */
     ustealo = (struct obj *) 0;
-    if (could_seduce(&gy.youmonst, mdef, mattk)) {
+    if (could_seduce(&gy.youmonst, mdef, mattk) && mdef->mcanmove) {
         /* find armor, and move it to end of inventory in the process */
         minvent_ptr = &mdef->minvent;
         while ((otmp = *minvent_ptr) != 0)