Fix Notices on PHP 7.4

qa-include/pages/question-view.php

@@ -1128,7 +1128,7 @@ function qa_page_q_add_c_form(&$qa_content, $question, $parent, $formid, $captch
 				qa_set_up_name_field($qa_content, $form['fields'], @$in['name'], $prefix);
 
 			qa_set_up_notify_fields($qa_content, $form['fields'], 'C', qa_get_logged_in_email(),
-				isset($in['notify']) ? $in['notify'] : qa_opt('notify_users_default'), $in['email'], @$errors['email'], $prefix);
+				isset($in['notify']) ? $in['notify'] : qa_opt('notify_users_default'), @$in['email'], @$errors['email'], $prefix);
 
 			$onloads = array();
 

qa-include/pages/question.php

@@ -70,7 +70,7 @@ if (!isset($questionData)) {
 list($question, $childposts, $achildposts, $parentquestion, $closepost, $duplicateposts, $extravalue, $categories, $favorite) = $questionData;
 
 
-if ($question['basetype'] != 'Q') // don't allow direct viewing of other types of post
+if (isset($question['basetype']) && $question['basetype'] != 'Q') // don't allow direct viewing of other types of post
 	$question = null;
 
 if (isset($question)) {

qa-include/pages/tag.php

@@ -82,7 +82,7 @@ foreach ($questions as $postid => $question) {
 
 $qa_content['canonical'] = qa_get_canonical();
 
-$qa_content['page_links'] = qa_html_page_links(qa_request(), $start, $pagesize, $tagword['tagcount'], qa_opt('pages_prev_next'));
+$qa_content['page_links'] = qa_html_page_links(qa_request(), $start, $pagesize, isset($tagword['tagcount']) ? $tagword['tagcount'] : 0, qa_opt('pages_prev_next'));
 
 if (empty($qa_content['page_links']))
 	$qa_content['suggest_next'] = qa_html_suggest_qs_tags(true);