[include/rtthread.h] rt_thread_close函数声明应当与RT_USING_HEAP无关

Author: xmaowu

include/rtthread.h

@@ -160,8 +160,8 @@ rt_thread_t rt_thread_create(const char *name,
                              rt_uint8_t  priority,
                              rt_uint32_t tick);
 rt_err_t rt_thread_delete(rt_thread_t thread);
-rt_err_t rt_thread_close(rt_thread_t thread);
 #endif /* RT_USING_HEAP */
+rt_err_t rt_thread_close(rt_thread_t thread);
 rt_thread_t rt_thread_self(void);
 rt_thread_t rt_thread_find(char *name);
 rt_err_t rt_thread_startup(rt_thread_t thread);