Fixed crash

core/src/io/anuke/mindustry/maps/Sector.java

@@ -27,6 +27,7 @@ public class Sector{
     public int width = 1, height = 1;
     /**Num of missions in this sector that have been completed so far.*/
     public int completedMissions;
+
     /**Display texture. Needs to be disposed.*/
     public transient Texture texture;
     /**Missions of this sector-- what needs to be accomplished to unlock it.*/

core/src/io/anuke/mindustry/maps/SectorPresets.java

@@ -25,10 +25,10 @@ public class SectorPresets{
         //TODO make 2x2
         //TODO more gen info
         put(0, 1, new SectorPreset(Structs.array(new BlockMission(UnitBlocks.daggerFactory), Missions.blockRecipe(UnitBlocks.commandCenter),
-        new CommandMission(UnitCommand.retreat), new CommandMission(UnitCommand.attack), new BattleMission()), Array.with(Items.copper), 1));
+            new CommandMission(UnitCommand.retreat), new CommandMission(UnitCommand.attack), new BattleMission()), Array.with(Items.copper), 1));
         //reconstructor mission
         put(0, -1, new SectorPreset(Structs.array(Missions.blockRecipe(mobile ? UpgradeBlocks.tridentPad : UpgradeBlocks.deltaPad),
-        new MechMission(Mechs.delta)), Array.with(Items.copper), 1));
+            new MechMission(Mechs.delta)), Array.with(Items.copper), 1));
         //oil mission
         put(1, 0, new SectorPreset(Array.with(), Array.with(Items.copper), 1));
     }};

core/src/io/anuke/mindustry/maps/missions/Mission.java

@@ -29,7 +29,7 @@ public abstract class Mission{
     }
 
     public GameMode getMode(){
-        return null;
+        return GameMode.noWaves;
     }
 
     /**Sets the message displayed on mission begin. Returns this mission for chaining.*/