Fix grenade rotation ends always the orientation (#5053), patch by Eugene C.

code/game/g_missile.c

@@ -46,6 +46,7 @@ void G_BounceMissile( gentity_t *ent, trace_t *trace ) {
 		// check for stop
 		if ( trace->plane.normal[2] > 0.2 && VectorLength( ent->s.pos.trDelta ) < 40 ) {
 			G_SetOrigin( ent, trace->endpos );
+			ent->s.time = level.time / 4;
 			return;
 		}
 	}