bugfix for obfuscated env

Author: RecursiveG

src/main/java/org/devinprogress/uniskinmod/ASMHelper.java

@@ -79,6 +79,13 @@ public static AbstractInsnNode getNthInsnNode(MethodNode mn,int opcode,int N){
         return n;
     }
 
+    public static AbstractInsnNode getLabel(AbstractInsnNode n){
+        if(!(n instanceof JumpInsnNode)){
+            throw new RuntimeException("Not a valid JumpInsnNode");
+        }else{
+            return ((JumpInsnNode)n).label;
+        }
+    }
     public static void InsertInvokeStaticBefore(MethodNode mn,AbstractInsnNode n,String targetClass,String targetMethod,String desc){
         mn.instructions.insertBefore(n, new MethodInsnNode(Opcodes.INVOKESTATIC,
                 targetClass.replace('.', '/'), targetMethod, desc,false));

src/main/java/org/devinprogress/uniskinmod/CoreTransformer.java

@@ -49,8 +49,9 @@ public static void injectCode(MethodNode mn){
         SkinCore.log("ASMTransformer Invoked");
         AbstractInsnNode n=ASMHelper.getNthInsnNode(mn,Opcodes.GETFIELD,2);
         FieldInsnNode loadGameProfileToStack=(FieldInsnNode) ((FieldInsnNode)n).clone(null);
-        n=ASMHelper.getNthInsnNode(mn, Opcodes.INVOKEVIRTUAL,8);
-        n=n.getNext().getNext();
+        n=ASMHelper.getNthInsnNode(mn, Opcodes.IFEQ,1);
+        n=ASMHelper.getLabel(n).getNext();
+        
         mn.instructions.insertBefore(n, new VarInsnNode(Opcodes.ALOAD,1));
         mn.instructions.insertBefore(n, new VarInsnNode(Opcodes.ALOAD,0));
         mn.instructions.insertBefore(n, loadGameProfileToStack);