Let server physics simulate even when there is no players(GoldSrc behaviour)

engine/server/sv_main.c

@@ -529,12 +529,12 @@ qboolean SV_IsSimulating( void )
 		return true; // force simulating for background map
 	}
 
-	if( !SV_HasActivePlayers( ))
-		return false;
-
 	if( Host_IsDedicated() )
 		return true; // always active for dedicated servers
 
+	if( !SV_HasActivePlayers( ))
+		return false;
+
 	// allow to freeze everything in singleplayer
 	if( svs.maxclients <= 1 && sv.playersonly )
 		return false;