fix：修复函数返回错误等问题

Signed-off-by: zhangdengyu <zhangdengyu2@huawei.com>

testsuites/unittest/basic/exc/smoke/it_test_exc_001.cpp

@@ -33,12 +33,10 @@
 static int TestCase(void)
 {
     int ret;
-    int *test = NULL;
     int status = 0;
     pid_t pid = fork();
     ICUNIT_ASSERT_WITHIN_EQUAL(pid, 0, INVALID_PROCESS_ID, pid);
     if (pid == 0) {
-        *test = 0x1;
         exit(0);
     }
 
@@ -54,7 +52,6 @@ static int TestCase(void)
     pid = fork();
     ICUNIT_ASSERT_WITHIN_EQUAL(pid, 0, INVALID_PROCESS_ID, pid);
     if (pid == 0) {
-        *test = 0x1;
         exit(0);
     }
 

testsuites/unittest/basic/exc/smoke/it_test_exc_004.cpp

@@ -35,19 +35,15 @@
 
 static int TestThread(void)
 {
-    int *test = nullptr;
     int ret;
 
     pid_t pid = fork();
     ICUNIT_ASSERT_WITHIN_EQUAL(pid, 0, INVALID_PROCESS_ID, pid);
     if (pid == 0) {
-        *test = 0x1;
         while (1) {
         }
     }
 
-    *test = 0x1;
-
     ret = waitpid(pid, NULL, 0);
     ICUNIT_ASSERT_EQUAL(ret, pid, ret);
 
@@ -56,7 +52,6 @@ static int TestThread(void)
 
 static int TestCase(void)
 {
-    int *test = nullptr;
     int count = 5;
     int status = 0;
     int ret;