fix: kora工具检视问题修复

【背景】kora工具检视问题修复

【修改方案】
1，对部分代码问题进行整改

【影响】
对现有的产品编译不会有影响。

Signed-off-by: wangchen <wangchen64@huawei.com>
Change-Id: Iafc58b7c71e5d139e11a0ae9d98ca5a57fc6549f

testsuites/unittest/libc/io/full/It_stdio_fwprintf_001.cpp

@@ -60,6 +60,8 @@ static UINT32 Testcase(VOID)
         fclose(testFile);
 
         testFile = fopen(pathname, "r");
+        ICUNIT_GOTO_NOT_EQUAL(testFile, NULL, testFile, EXIT);
+
         p = fgetws(tarStr, 16, testFile); // 16， read size,total write and '\0'
         nRet = wcscmp(L"hello world 666", tarStr);
         ICUNIT_GOTO_EQUAL(nRet, 0, nRet, EXIT);

testsuites/unittest/libc/io/full/It_stdio_hasmntopt_001.cpp

@@ -55,6 +55,10 @@ static UINT32 testcase(VOID)
     }
 
     mnt_new = (struct mntent *)malloc(sizeof(struct mntent));
+    if (mnt_new == NULL) {
+        (VOID)RecoveryFileEnv(pathList, 1);
+        return LOS_NOK;
+    }
     mnt_new->mnt_fsname = "UUID=c4992556-a86e-45e8-ba5f-190b16a9073x";
     mnt_new->mnt_dir = "/usr1";
     mnt_new->mnt_type = "ext3";

testsuites/unittest/libc/io/full/It_stdio_putwc_001.cpp

@@ -55,6 +55,8 @@ static UINT32 Testcase(VOID)
         fclose(putwcFile);
 
         putwcFile = fopen(pathname, "r");
+        ICUNIT_GOTO_NOT_EQUAL(putwcFile, NULL, putwcFile, EXIT);
+
         tarWc = getwc(putwcFile);
         ICUNIT_GOTO_EQUAL(tarWc, L'H', tarWc, EXIT);