st/nine: Fix resource9 private data

Store a copy of GUID in the header that is under our control and use it
as key for the hashtable instead of using the application provided pointer.
The application might change the memory after leaving the function.

Fixes a crash for issue https://github.com/iXit/Mesa-3D/issues/130

Signed-off-by: Patrick Rudolph <siro@das-labor.org>
Reviewed-by: Axel Davy <axel.davy@ens.fr>

src/gallium/state_trackers/nine/nine_pdata.h

@@ -5,6 +5,7 @@
 struct pheader
 {
     boolean unknown;
+    GUID guid;
     DWORD size;
     char data[1];
 };

src/gallium/state_trackers/nine/resource9.c

@@ -141,8 +141,9 @@ NineResource9_SetPrivateData( struct NineResource9 *This,
 
     header->size = SizeOfData;
     memcpy(header->data, user_data, header->size);
+    memcpy(&header->guid, refguid, sizeof(header->guid));
 
-    err = util_hash_table_set(This->pdata, refguid, header);
+    err = util_hash_table_set(This->pdata, &header->guid, header);
     if (err == PIPE_OK) {
         if (header->unknown) { IUnknown_AddRef(*(IUnknown **)header->data); }
         return D3D_OK;