[master] check creat() return

lib/isc/tests/file_test.c

@@ -56,12 +56,12 @@ ATF_TC_BODY(isc_file_sanitize, tc) {
 	ATF_CHECK_EQ(result, ISC_R_SUCCESS);
 	ATF_CHECK(strcmp(buf, F(NAME)) == 0);
 
-	creat(F(TRUNC_SHA), 0644);
+	ATF_CHECK(creat(F(TRUNC_SHA), 0644) != -1);
 	result = isc_file_sanitize("testdata/file", NAME, "test", buf, 1024);
 	ATF_CHECK_EQ(result, ISC_R_SUCCESS);
 	ATF_CHECK(strcmp(buf, F(TRUNC_SHA)) == 0);
 
-	creat(F(SHA), 0644);
+	ATF_CHECK(creat(F(SHA), 0644) != -1);
 	result = isc_file_sanitize("testdata/file", NAME, "test", buf, 1024);
 	ATF_CHECK_EQ(result, ISC_R_SUCCESS);
 	ATF_CHECK(strcmp(buf, F(SHA)) == 0);