Fixed compiler warnings

sql/log.h:
  Fixed compiler warnings reported for gcc 2.7.1
storage/xtradb/handler/ha_innodb.cc:
  Remove not used variables

sql/log.h

@@ -477,8 +477,8 @@ class MYSQL_BIN_LOG: public TC_LOG, private MYSQL_LOG
   void mark_xids_active(uint xid_count);
 
 public:
-  MYSQL_LOG::generate_name;
-  MYSQL_LOG::is_open;
+  using MYSQL_LOG::generate_name;
+  using MYSQL_LOG::is_open;
 
   /* This is relay log */
   bool is_relay_log;

storage/xtradb/handler/ha_innodb.cc

@@ -12562,7 +12562,7 @@ static MYSQL_SYSVAR_BOOL(use_sys_stats_table, innobase_use_sys_stats_table,
   "So you should use ANALYZE TABLE command intentionally.",
   NULL, NULL, FALSE);
 
-#ifdef UNIV_DEBUG
+#ifdef UNIV_DEBUG_never
 static MYSQL_SYSVAR_ULONG(sys_stats_root_page, innobase_sys_stats_root_page,
   PLUGIN_VAR_RQCMDARG | PLUGIN_VAR_READONLY,
   "Override the SYS_STATS root page id, 0 = no override (for testing only)",
@@ -12785,7 +12785,7 @@ static MYSQL_SYSVAR_ULONG(read_ahead_threshold, srv_read_ahead_threshold,
   "trigger a readahead.",
   NULL, NULL, 56, 0, 64, 0);
 
-#ifdef UNIV_DEBUG
+#ifdef UNIV_DEBUG_never
 static MYSQL_SYSVAR_UINT(trx_rseg_n_slots_debug, trx_rseg_n_slots_debug,
   PLUGIN_VAR_RQCMDARG,
   "Debug flags for InnoDB to limit TRX_RSEG_N_SLOTS for trx_rsegf_undo_find_free()",