Fix overworld being replaced with nether, fix #10

Author: Runemoro

build.gradle

@@ -76,6 +76,7 @@ processResources {
 }
 
 jar {
+    finalizedBy reobfJar
     manifest.attributes(
             'Main-Class': 'org.dimdev.rift.Installer'
     )

src/main/java/org/dimdev/rift/mixin/hook/MixinMinecraftServer.java

@@ -113,8 +113,8 @@ public void loadAllWorlds(String saveName, String worldName, long seed, WorldTyp
 
         List<WorldServer> worldList = new ArrayList<>();
         worldList.add(overworld);
-        dimensionIdToWorldIndex.put(0, worldList.size());
-        dimensionTypeToWorldIndex.put(DimensionType.OVERWORLD, worldList.size());
+        dimensionIdToWorldIndex.put(0, 0);
+        dimensionTypeToWorldIndex.put(DimensionType.OVERWORLD, 0);
 
         // Create other worlds
         List<DimensionType> dimensionTypes;