Do not dereference null pointer for no matching tests (#1191)

When invoking for example

    test_c11_atomics test-that-does-not-exist

parseAndCallCommandLineTests() would attempt to dereference
`resultTestList` which is still a null pointer.

Signed-off-by: Sven van Haastregt <sven.vanhaastregt@arm.com>

test_common/harness/testHarness.cpp

@@ -713,7 +713,6 @@ int parseAndCallCommandLineTests(int argc, const char *argv[],
             ret = saveResultsToJson(filename, argv[0], testList,
                                     selectedTestList, resultTestList, testNum);
         }
-    }
 
         if (std::any_of(resultTestList, resultTestList + testNum,
                         [](test_status result) {
@@ -728,6 +727,7 @@ int parseAndCallCommandLineTests(int argc, const char *argv[],
         {
             ret = EXIT_FAILURE;
         }
+    }
 
     free(selectedTestList);
     free(resultTestList);