Fixed settings check (#139)

plugins/check/index.php

@@ -50,12 +50,12 @@ if (!isset($dbPassword))			$error .= ('Error 402: No property for $dbPassword in
 if (!isset($dbHost)||$dbHost==='')	$error .= ('Error 403: No property for $dbHost in config.php' . PHP_EOL);
 
 # Settings
-if (!$settings['username']||$settings['username']=='')			$error .= ('Error 404: Username empty or not set in database' . PHP_EOL);
-if (!$settings['password']||$settings['password']=='')			$error .= ('Error 405: Password empty or not set in database' . PHP_EOL);
-if (!$settings['thumbQuality']||$settings['thumbQuality']=='')	$error .= ('Error 406: No or wrong property for thumbQuality in database' . PHP_EOL);
-if (!$settings['sorting']||$settings['sorting']=='')			$error .= ('Error 407: Wrong property for sorting in database' . PHP_EOL);
-if (!$settings['plugins'])										$error .= ('Error 408: No property for plugins in database' . PHP_EOL);
-if (!$settings['checkForUpdates']||($settings['checkForUpdates']!='0'&&$settings['checkForUpdates']!='1')) $error .= ('Error 409: No or wrong property for checkForUpdates in database' . PHP_EOL);
+if (!isset($settings['username'])||$settings['username']=='')			$error .= ('Error 404: Username empty or not set in database' . PHP_EOL);
+if (!isset($settings['password'])||$settings['password']=='')			$error .= ('Error 405: Password empty or not set in database' . PHP_EOL);
+if (!isset($settings['thumbQuality'])||$settings['thumbQuality']=='')	$error .= ('Error 406: No or wrong property for thumbQuality in database' . PHP_EOL);
+if (!isset($settings['sorting'])||$settings['sorting']=='')			$error .= ('Error 407: Wrong property for sorting in database' . PHP_EOL);
+if (!isset($settings['plugins']))										$error .= ('Error 408: No property for plugins in database' . PHP_EOL);
+if (!isset($settings['checkForUpdates'])||($settings['checkForUpdates']!='0'&&$settings['checkForUpdates']!='1')) $error .= ('Error 409: No or wrong property for checkForUpdates in database' . PHP_EOL);
 
 # Permissions
 if (substr(sprintf('%o', @fileperms(LYCHEE_UPLOADS_BIG)), -4)!='0777')		$error .= ('Error 500: Wrong permissions for \'uploads/big\' (777 required)' . PHP_EOL);