Move PTHREAD declaration back to where it was in rig.h

include/hamlib/rig.h

@@ -2551,12 +2551,12 @@ struct rig_state {
     void *async_data_handler_priv_data;
     volatile int poll_routine_thread_run;
     void *poll_routine_priv_data;
-    hamlib_port_t rigport;  /*!< Rig port (internal use). */
-    hamlib_port_t pttport;  /*!< PTT port (internal use). */
-    hamlib_port_t dcdport;  /*!< DCD port (internal use). */
 #ifdef HAVE_PTHREAD
     pthread_mutex_t mutex_set_transaction;
 #endif
+    hamlib_port_t rigport;  /*!< Rig port (internal use). */
+    hamlib_port_t pttport;  /*!< PTT port (internal use). */
+    hamlib_port_t dcdport;  /*!< DCD port (internal use). */
     /********* DO NOT ADD or CHANGE anything (or than to rename) ABOVE THIS LINE *********/
     /********* ENSURE ANY NEW ITEMS ARE ADDED AFTER HERE *********/
     /* flags instructing the rig_get routines to use cached values when asyncio is in use */