Greased saddle is slippery

doc/fixes3-7-0.txt

@@ -983,6 +983,7 @@ recent changes to losedogs() could result in an infinite loop when migrating
 	monsters try to arrive as hero moves to a different level
 when invisible without see invisible you could see your hands glowing red
 	after reading a scroll of confuse monster and delivering melee hits
+greased saddle makes it impossible to mount the steed
 
 
 Fixes to 3.7.0-x Problems that Were Exposed Via git Repository

src/steed.c

@@ -322,6 +322,7 @@ mount_steed(
     }
     if (!force
         && (Confusion || Fumbling || Glib || Wounded_legs || otmp->cursed
+            || otmp->greased
             || (u.ulevel + mtmp->mtame < rnd(MAXULEV / 2 + 5)))) {
         if (Levitation) {
             pline("%s slips away from you.", Monnam(mtmp));