fix db quota messages

Author: jnorell

server/lib/classes/cron.d/100-monitor_database_size.inc.php

@@ -95,12 +95,12 @@ public function onRunJob() {
 				if(!is_numeric($quota)) continue;
 
 				if($quota < 1 || $quota > $data[$i]['size']) {
-					print $rec['database_name'] . ' does not exceed quota qize: ' . $quota . ' > ' . $data[$i]['size'] . "\n";
+					print 'database ' . $rec['database_name'] . ' size does not exceed quota: ' . $quota . ' (quota) > ' . $data[$i]['size'] . " (used)\n";
 					if($rec['quota_exceeded'] == 'y') {
 						$app->dbmaster->datalogUpdate('web_database', array('quota_exceeded' => 'n'), 'database_id', $rec['database_id']);
 					}
 				} elseif($rec['quota_exceeded'] == 'n') {
-					print $rec['database_name'] . ' exceeds quota qize: ' . $quota . ' < ' . $data[$i]['size'] . "\n";
+					print 'database ' . $rec['database_name'] . ' size exceeds quota: ' . $quota . ' (quota) < ' . $data[$i]['size'] . " (used)\n";
 					$app->dbmaster->datalogUpdate('web_database', array('quota_exceeded' => 'y'), 'database_id', $rec['database_id']);
 				}
 			}

server/lib/classes/db_mysql.inc.php

@@ -634,12 +634,12 @@ public function getDatabaseSize($database_name) {
 
 		$result = $this->_query("SELECT SUM(data_length+index_length) FROM information_schema.TABLES WHERE table_schema='".$this->escape($database_name)."'");
 		if(!$result) {
-			$this->_sqlerror('Unable to get the database-size for ' . $database_name);
+			$this->_sqlerror('Unable to determine the size of database ' . $database_name);
 			return;
 		}
 		$database_size = $result->getAsRow();
 		$result->free();
-		return $database_size[0];
+        return $database_size[0] ? $database_size[0] : 0;
 	}
 
 	//** Function to fill the datalog with a full differential record.