fix(ipc): guard LOG_D against null thread pointer in rt_susp_list_dequeue

When rt_susp_list_dequeue() returns RT_NULL (empty suspended list), the
LOG_D call dereferenced thread->parent.name without a null check, causing
a crash in debug builds.

Per @wdfk-prog review feedback, push the null check into the LOG_D
argument using a ternary so the entire expression — including the null
check — is compiled out when LOG_D is disabled. This avoids an unnecessary
runtime branch in release builds.

Also fix a typo in the change-log header: 'redesigen' -> 'redesign'.

Signed-off-by: Srikanth Patchava <srpatcha@users.noreply.github.com>

Author: srpatcha

src/ipc.c

@@ -44,7 +44,7 @@
  * 2022-04-08     Stanley      Correct descriptions
  * 2022-10-15     Bernard      add nested mutex feature
  * 2022-10-16     Bernard      add prioceiling feature in mutex
- * 2023-04-16     Xin-zheqi    redesigen queue recv and send function return real message size
+ * 2023-04-16     Xin-zheqi    redesign queue recv and send function return real message size
  * 2023-09-15     xqyjlj       perf rt_hw_interrupt_disable/enable
  */
 
@@ -140,7 +140,7 @@ struct rt_thread *rt_susp_list_dequeue(rt_list_t *susp_list, rt_err_t thread_err
     }
     rt_sched_unlock(slvl);
 
-    LOG_D("resume thread:%s\n", thread->parent.name);
+    LOG_D("resume thread:%s\n", (thread == RT_NULL) ? "NULL" : thread->parent.name);
 
     return thread;
 }