branches/innodb+: Merge c6504 from branches/innodb+_persistent_stats:

  ------------------------------------------------------------------------
  r6504 | vasil | 2010-01-21 19:41:38 +0200 (Thu, 21 Jan 2010) | 3 lines
  Changed paths:
     M /branches/innodb+_persistent_stats/include/ut0lst.h
  
  branches/innodb+: Remove compiler warning
  
  the address of 'index1' will always evaluate as 'true'
  ------------------------------------------------------------------------

include/ut0lst.h

@@ -110,7 +110,7 @@ Adds the node as the last element in a two-way linked list.
 */
 #define UT_LIST_ADD_LAST(NAME, BASE, N)\
 {\
-	ut_ad(N);\
+	ut_ad(N != NULL);\
 	((BASE).count)++;\
 	((N)->NAME).prev = (BASE).end;\
 	((N)->NAME).next = NULL;\