fix rt_size_t as rt_uint32_t

include/rtdef.h

@@ -78,8 +78,8 @@ typedef unsigned long                   rt_uint64_t;    /**< 64bit unsigned inte
 #else
 typedef signed long long                rt_int64_t;     /**< 64bit integer type */
 typedef unsigned long long              rt_uint64_t;    /**< 64bit unsigned integer type */
-#endif
-#endif
+#endif /* ARCH_CPU_64BIT */
+#endif /* RT_USING_ARCH_DATA_TYPE */
 
 typedef int                             rt_bool_t;      /**< boolean type */
 typedef long                            rt_base_t;      /**< Nbit CPU related date type */
@@ -89,7 +89,7 @@ typedef rt_base_t                       rt_err_t;       /**< Type for error numb
 typedef rt_uint32_t                     rt_time_t;      /**< Type for time stamp */
 typedef rt_uint32_t                     rt_tick_t;      /**< Type for tick count */
 typedef rt_base_t                       rt_flag_t;      /**< Type for flags */
-typedef rt_ubase_t                      rt_size_t;      /**< Type for size number */
+typedef rt_uint32_t                     rt_size_t;      /**< Type for size number */
 typedef rt_ubase_t                      rt_dev_t;       /**< Type for device */
 typedef rt_base_t                       rt_off_t;       /**< Type for offset */