Introduce #define UNIV_LIST_DEBUG for enabling the debug code in

UT_LIST_REMOVE_CLEAR().

include/univ.i

@@ -75,6 +75,7 @@ memory is read outside the allocated blocks. */
 
 #if 0
 #define UNIV_DEBUG
+#define UNIV_LIST_DEBUG
 #define UNIV_MEM_DEBUG
 #define UNIV_IBUF_DEBUG
 #define UNIV_SYNC_DEBUG

include/ut0lst.h

@@ -124,7 +124,7 @@ name, NODE1 and NODE2 are pointers to nodes. */
 }\
 
 /* Invalidate the pointers in a list node. */
-#ifdef UNIV_DEBUG
+#ifdef UNIV_LIST_DEBUG
 # define UT_LIST_REMOVE_CLEAR(NAME, N)		\
 ((N)->NAME.prev = (N)->NAME.next = (void*) -1)
 #else