Fixed crash when trying to open non-existent map

core/assets/bundles/bundle.properties

@@ -268,6 +268,7 @@ text.error.invalidaddress = Invalid address.
 text.error.timedout = Timed out!\nMake sure the host has port forwarding set up, and that the address is correct!
 text.error.mismatch = Packet error:\npossible client/server version mismatch.\nMake sure you and the host have the latest version of Mindustry!
 text.error.alreadyconnected = Already connected.
+text.error.mapnotfound = Map file not found!
 text.error.any = Unkown network error.
 
 text.settings.language = Language

core/src/io/anuke/mindustry/ui/dialogs/JoinDialog.java

@@ -177,8 +177,6 @@ public class JoinDialog extends FloatingDialog{
                 t.add("[lightgray]" + Bundles.format("text.save.map", host.mapname) + " / " + Bundles.format("text.save.wave", host.wave)).left();
             }).expand().left().bottom().padLeft(12f).padBottom(8);
 
-            //server.content.add(versionString).top().expandY().top().expandX();
-
         }, e -> {
             server.content.clear();
             server.content.add("$text.host.invalid");
@@ -323,7 +321,6 @@ public class JoinDialog extends FloatingDialog{
         public String ip;
         public int port;
 
-        transient Host host;
         transient Table content;
 
         void setIP(String ip){

core/src/io/anuke/mindustry/ui/dialogs/MapsDialog.java

@@ -147,9 +147,14 @@ public class MapsDialog extends FloatingDialog{
         table.row();
 
         table.addImageTextButton("$text.editor.openin", "icon-load-map", "clear", 16 * 2, () -> {
-            Vars.ui.editor.beginEditMap(map.stream.get());
-            dialog.hide();
-            hide();
+            try{
+                Vars.ui.editor.beginEditMap(map.stream.get());
+                dialog.hide();
+                hide();
+            }catch(Exception e){
+                e.printStackTrace();
+                ui.showError("$text.error.mapnotfound");
+            }
         }).fillX().height(50f).marginLeft(6);
 
         table.addImageTextButton("$text.delete", "icon-trash-16", "clear", 16 * 2, () -> {