Fix MR not working vs Paralyze spell

Magic resistance was doing nothing to reduce or negate the paralysis caused
by the Paralyze monster spell, despite being noticed by the caster and
showing the sparkle animation. Now MR cuts the duration to 1 turn, like
vanilla. (Free action still negates it fully, as handled by make_paralyzed.)
Also fixed the spell's paralysis messages being suppressed.

src/mcastu.c

@@ -1021,9 +1021,10 @@ cast_cleric_spell(struct monst *mtmp, int dmg, int spellnum)
         if (Antimagic) {
             shieldeff(u.ux, u.uy);
             monstseesu(M_SEEN_MAGR);
+            dmg = 1;
         }
         dynamic_multi_reason(mtmp, "paralyzed", FALSE);
-        make_paralyzed(dmg, FALSE, (const char *) 0);
+        make_paralyzed(dmg, TRUE, (const char *) 0);
         dmg = 0;
         break;
     case CLC_CONFUSE_YOU: