still more levitation blocking (trunk only)

Removing ring or boots of levitation while stuck in solid rock was
silent as intended, but timeout of potion or spell said "you float gently
to the ground" even though there's no actual movement.

     Using '>' command while in solid rock said "you can't go down here"
without attempting to toggle off controlled levitation.

src/trap.c

@@ -2669,7 +2669,13 @@ long hmask, emask;     /* might cancel timeout */
 
 	HLevitation &= ~hmask;
 	ELevitation &= ~emask;
-	if(Levitation) return(0); /* maybe another ring/potion/boots */
+	if (Levitation) return 0; /* maybe another ring/potion/boots */
+	if (BLevitation) {
+	    /* Levitation is blocked, so hero is not actually floating
+	       hence shouldn't have float_down effects and feedback */
+	    float_vs_flight(); /* before nomul() rather than after */
+	    return 0;
+	}
 	nomul(0);	/* stop running or resting */
 	if (BFlying) {
 	    /* controlled flight no longer overridden by levitation */