【背景】内源代码检视问题

【修改方案】
1，按检视意见，进行资源泄露等问题的修改

【影响】
对现有的产品编译不会有影响。

re #I4WV56
Signed-off-by: wangchen <wangchen64@huawei.com>

testsuites/unittest/basic/mem/shm/full/shm_test_013.cpp

@@ -44,9 +44,10 @@ static int testcase(void)
     ICUNIT_ASSERT_NOT_EQUAL(shmfd, -1, shmfd);
 
     writebuf = (char*)malloc(pageSize);
+    ICUNIT_ASSERT_NOT_EQUAL(writebuf, NULL, writebuf);
     readbuf = (char*)malloc(pageSize);
     ICUNIT_ASSERT_NOT_EQUAL(readbuf, NULL, readbuf);
-    ICUNIT_ASSERT_NOT_EQUAL(writebuf, NULL, writebuf);
+
     memset_s(writebuf, pageSize, 0xf, pageSize);
 
     count = write(shmfd, writebuf, pageSize);