Fix incorrect parameter arity in building codeAsInlining.

Change-Id: I73cd81e044dfaac214f54721b6ce4ea7ced8dac5
diff --git a/src/main/java/com/android/tools/r8/graph/DexCode.java b/src/main/java/com/android/tools/r8/graph/DexCode.java
index c2bfc40..589ae3a 100644
--- a/src/main/java/com/android/tools/r8/graph/DexCode.java
+++ b/src/main/java/com/android/tools/r8/graph/DexCode.java
@@ -187,7 +187,7 @@
       // has a position.
       return new DexDebugInfo(
           0,
-          new DexString[caller.getArity()],
+          new DexString[callee.getArity()],
           new DexDebugEvent[] {
             new DexDebugEvent.SetInlineFrame(callee, callerPosition),
             DexDebugEvent.ZERO_CHANGE_DEFAULT_EVENT