riding speed

While riding, your speed was calculated using the steeds speed only when
moving multi locations.  So, if you were walking step by step, it would use
your speed instead.  Changed this to use the steed's speed any time actual
movement occurs.

doc/fixes34.1

@@ -151,6 +151,7 @@ Samurai quest was missing several doors
 Cancelled while polymorphed and Unchanging should provide feedback
 stone to flesh on a statue with contents would lose the contents if a
 	monster was on the same location as the statue
+steed movement would use your speed if walking step by step
 
 
 Platform- and/or Interface-Specific Fixes

src/allmain.c

@@ -100,7 +100,7 @@ moveloop()
 
 		    /* calculate how much time passed. */
 #ifdef STEED
-		    if (u.usteed && flags.mv) {
+		    if (u.usteed && u.umoved) {
 			/* your speed doesn't augment steed's speed */
 			moveamt = mcalcmove(u.usteed);
 		    } else