Replace x() by isset(), !empty() or defaults()

- Remove extraneous parentheses around empty() calls
- Remove duplicate calls to intval(), count() or strlen() after empty()
- Replace ternary operators outputting binary value with empty() return value
- Rewrite defaults() without x()

mod/suggest.php

@@ -20,7 +20,7 @@ function suggest_init(App $a)
 		return;
 	}
 
-	if (x($_GET,'ignore') && intval($_GET['ignore'])) {
+	if (!empty($_GET['ignore'])) {
 		// Check if we should do HTML-based delete confirmation
 		if ($_REQUEST['confirm']) {
 			// <form> can't take arguments in its "action" parameter