Fixed some compiler errors

mysys/my_thr_init.c:
  Added missing DBUG_OFF
storage/maria/ma_loghandler.c:
  Fixed wrong macro

mysys/my_thr_init.c

@@ -385,6 +385,8 @@ struct st_my_thread_var *_my_thread_var(void)
   return tmp;
 }
 
+#ifndef DBUG_OFF
+
 extern void *my_thread_var_get_dbug(my_bool *error)
 {
   struct st_my_thread_var *tmp=
@@ -406,7 +408,7 @@ extern void my_thread_var_set_dbug(void *dbug)
   struct st_my_thread_var *tmp= _my_thread_var();
   tmp->dbug= dbug;
 }
-
+#endif
 
 /****************************************************************************
   Get name of current thread.

storage/maria/ma_loghandler.c

@@ -1262,7 +1262,7 @@ static my_bool translog_buffer_lock(struct st_translog_buffer *buffer)
 }
 #else
 #define translog_buffer_lock(B) \
-  pthread_mutex_lock(&B->mutex)
+  pthread_mutex_lock(&((B)->mutex))
 #endif
 
 
@@ -1296,7 +1296,7 @@ static my_bool translog_buffer_unlock(struct st_translog_buffer *buffer)
 }
 #else
 #define translog_buffer_unlock(B) \
-  pthread_mutex_unlock(&B->mutex)
+  pthread_mutex_unlock(&((B)->mutex))
 #endif