Fix to in_array likert bug

To see this error create a survey with a section and two likert questions. Make the second question required and use the shortcode or "Insert Into New Page" to go to the survey. Answer the first question but not the second question and click "Submit". You should get errors like this:
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Warning: in_array() expects parameter 2 to be array, string given in /home/sitename/public_html/wordpress/wp-content/plugins/wp-survey-and-quiz-tool/pages/site/questions/likert.php on line 5
id="answer_4_1" /> 1   Warning: in_array() expects parameter 2 to be array, string given in /home/sitename/public_html/wordpress/wp-content/plugins/wp-survey-and-quiz-tool/pages/site/questions/likert.php on line 5
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I used var_dump to see that $givenAnswer is an integer not an array. This fix has been thoroughly texted.