Hotfix NPE

SchematicSystem_Main/src/de/steamwar/schematicsystem/CheckSchemType.java

@@ -70,9 +70,9 @@ public class CheckSchemType implements ICheckSchemType {
 
     public AutoCheckResult autoCheck(Schematic schematic) {
         return VersionedCallable.call(new VersionedCallable<>(AutoCheckResult::new, 8),
-                new VersionedCallable<>(() -> CheckSchemType_12.autoCheck(schematic, null), 12),
+                new VersionedCallable<>(() -> CheckSchemType_12.autoCheck(schematic, this), 12),
                 new VersionedCallable<>(AutoCheckResult::new, 13),
-                new VersionedCallable<>(() -> CheckSchemType_15.autoCheck(schematic, null), 15));
+                new VersionedCallable<>(() -> CheckSchemType_15.autoCheck(schematic, this), 15));
     }
 
     @Override