branches/zip: Fix errors when compiling with UNIV_DEBUG and UNIV_SYNC_DEBUG.

buf0buf.ic: Remove the extern declaration of buf_dbg_counter.
It was declared static in buf0buf.c in r1025.

ha0ha.c: #include "btr0sea.h" #ifdef UNIV_SYNC_DEBUG.  Assertions on
btr_search_latch were added in r1041.

ha/ha0ha.c

@@ -14,6 +14,9 @@ Created 8/22/1994 Heikki Tuuri
 #ifdef UNIV_DEBUG
 # include "buf0buf.h"
 #endif /* UNIV_DEBUG */
+#ifdef UNIV_SYNC_DEBUG
+# include "btr0sea.h"
+#endif /* UNIV_SYNC_DEBUG */
 #include "page0page.h"
 
 /*****************************************************************

include/buf0buf.ic

@@ -11,11 +11,6 @@ Created 11/5/1995 Heikki Tuuri
 #include "buf0rea.h"
 #include "mtr0mtr.h"
 
-#ifdef UNIV_DEBUG
-extern ulint		buf_dbg_counter; /* This is used to insert validation
-					operations in execution in the
-					debug version */
-#endif /* UNIV_DEBUG */
 /************************************************************************
 Recommends a move of a block to the start of the LRU list if there is danger
 of dropping from the buffer pool. NOTE: does not reserve the buffer pool