Notify the debugger of class preparation.

Change-Id: Ic9863d0cc1176c474df2239a286a01393845d589
diff --git a/src/jdwp/jdwp.h b/src/jdwp/jdwp.h
index 36e2657..03c70b0 100644
--- a/src/jdwp/jdwp.h
+++ b/src/jdwp/jdwp.h
@@ -205,7 +205,7 @@
   /*
    * Class has been prepared.
    */
-  bool PostClassPrepare(int tag, RefTypeId refTypeId, const char* signature, int status);
+  bool PostClassPrepare(JdwpTypeTag tag, RefTypeId refTypeId, const std::string& signature, int status);
 
   /*
    * The VM is about to stop.