Fix frame rewriting in class transformer

We skipped every second frame

Change-Id: Ia5a1782cdb2c12b9aa079d1a897775447c9bbe68
diff --git a/src/test/java/com/android/tools/r8/transformers/ClassFileTransformer.java b/src/test/java/com/android/tools/r8/transformers/ClassFileTransformer.java
index e6ba0f6..4348acf 100644
--- a/src/test/java/com/android/tools/r8/transformers/ClassFileTransformer.java
+++ b/src/test/java/com/android/tools/r8/transformers/ClassFileTransformer.java
@@ -1118,14 +1118,12 @@
               if (object instanceof String) {
                 local[i] = rewriteASMInternalTypeName((String) object);
               }
-              i++;
             }
             for (int i = 0; i < numStack; i++) {
               Object object = stack[i];
               if (object instanceof String) {
                 stack[i] = rewriteASMInternalTypeName((String) object);
               }
-              i++;
             }
             super.visitFrame(type, numLocal, local, numStack, stack);
           }