Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.1-opt

into  magare.gmz:/home/kgeorge/mysql/autopush/warnings-5.1-opt

sql/item.cc

@@ -18,6 +18,7 @@
 #pragma implementation				// gcc: Class implementation
 #endif
 #include "mysql_priv.h"
+#include <mysql.h>
 #include <m_ctype.h>
 #include "my_dir.h"
 #include "sp_rcontext.h"

sql/mysql_priv.h

@@ -74,7 +74,6 @@ extern const char *primary_key_name;
 #include "mysql_com.h"
 #include <violite.h>
 #include "unireg.h"
-#define IS_NUM(t)	((t) <= FIELD_TYPE_INT24 || (t) == FIELD_TYPE_YEAR || (t) == FIELD_TYPE_NEWDECIMAL)
 
 void init_sql_alloc(MEM_ROOT *root, uint block_size, uint pre_alloc_size);
 void *sql_alloc(size_t);