console: fix ppp iteration crash report

src/etc/rc.initial.setlanip

@@ -76,19 +76,20 @@ function console_prompt_for_yn ($prompt_text) {
 	return $boolean_answer;
 }
 
-function console_get_interface_from_ppp($realif) {
+function console_get_interface_from_ppp($realif)
+{
 	global $config;
 
-	if (is_array($config['ppps']['ppp']) && count($config['ppps']['ppp'])) {
+	if (isset($config['ppps']['ppp'])) {
 		foreach ($config['ppps']['ppp'] as $pppid => $ppp) {
 			if ($realif == $ppp['if']) {
-				$ifaces = explode(",", $ppp['ports']);
+				$ifaces = explode(',', $ppp['ports']);
 				return $ifaces[0];
 			}
 		}
 	}
 
-	return "";
+	return '';
 }
 
 function prompt_for_enable_dhcp_server($version = 4) {