FIXUP: update xglDbg.h for XGL_INSTANCE

commit ba1c0f351db007373bf16d95e607ec4511e27164
Author: Courtney Goeltzenleuchter <courtney@LunarG.com>
Date:   Mon Apr 13 14:10:06 2015 -0600

xgl: update xglDbg.h for XGL_INSTANCE
diff --git a/tools/glave/scripts/vk_generate.py b/tools/glave/scripts/vk_generate.py
index 44cdf15..670b645 100755
--- a/tools/glave/scripts/vk_generate.py
+++ b/tools/glave/scripts/vk_generate.py
@@ -1749,7 +1749,7 @@
                     rbody.append('            for (unsigned int i = 0; i < pPacket->maxLayerCount; i++)')
                     rbody.append('                bufptr[i] = GLV_NEW_ARRAY(char, pPacket->maxStringSize);')
                 elif proto.name == 'DestroyInstance':
-                    rbody.append('            xglDbgUnregisterMsgCallback(remap(pPacket->instance), g_fpDbgMsgCallback);')
+                    rbody.append('            xglDbgUnregisterMsgCallback(m_objMapper.remap(pPacket->instance), g_fpDbgMsgCallback);')
                 rr_string = '            '
                 if ret_value:
                     rr_string = '            replayResult = '