Skip invalid lobbies

desktop/src/mindustry/desktop/steam/SNet.java

@@ -321,6 +321,7 @@ public class SNet implements SteamNetworkingCallback, SteamMatchmakingCallback,
                 try{
                     SteamID lobby = smat.getLobbyByIndex(i);
                     String mode = smat.getLobbyData(lobby, "gamemode");
+                    if(mode == null || mode.isEmpty() || Strings.parseInt(smat.getLobbyData(lobby, "version"), -1) == -1) continue;
                     Host out = new Host(
                         -1, //invalid ping
                         smat.getLobbyData(lobby, "name"),

gradle.properties

@@ -1,3 +1,3 @@
 org.gradle.daemon=true
 org.gradle.jvmargs=-Xms256m -Xmx1024m
-archash=1973bc050404bd7a0da9d07404e02d0255b22358
+archash=0e99b0291f81d74d335dca8b0cf3bf26931f1197