Modified sql install script - email/event constraint was not working because...

Modified sql install script - email/event constraint was not working because the foreign key was signed and the referenced key was unsigned. Foreign key is now unsigned.

app/code/community/FreeLunchLabs/MailGun/sql/mailgun_setup/mysql4-install-1.0.0.php

@@ -5,7 +5,12 @@ $installer = $this;
 $installer->startSetup();
 
 $installer->run("
- 
+
+ SET FOREIGN_KEY_CHECKS = 0;
+ DROP TABLE IF EXISTS {$this->getTable('freelunchlabs_mailgun/email')};
+ DROP TABLE IF EXISTS {$this->getTable('freelunchlabs_mailgun/event')};
+ SET FOREIGN_KEY_CHECKS = 1;
+
 -- DROP TABLE IF EXISTS {$this->getTable('freelunchlabs_mailgun/email')};
 CREATE TABLE {$this->getTable('freelunchlabs_mailgun/email')} (
   `id` int(11) unsigned NOT NULL auto_increment,
@@ -21,11 +26,11 @@ CREATE TABLE {$this->getTable('freelunchlabs_mailgun/email')} (
 -- DROP TABLE IF EXISTS {$this->getTable('freelunchlabs_mailgun/event')};
 CREATE TABLE {$this->getTable('freelunchlabs_mailgun/event')} (
   `id` int(11) unsigned NOT NULL auto_increment,
-  `email_id` int(11) NULL,
+  `email_id` int(11) unsigned NULL,
   `event_type` varchar(255) NOT NULL default '',
-  `timestamp` varchar(255)
+  `timestamp` varchar(255),
   PRIMARY KEY (`id`),
-  CONSTRAINT `fk_event_tracking` FOREIGN KEY (`email_id`) REFERENCES `{$this->getTable('freelunchlabs_mailgun/email')}` (`id`) ON DELETE CASCADE
+  CONSTRAINT `fk_mailgun_event` FOREIGN KEY (`email_id`) REFERENCES `{$this->getTable('freelunchlabs_mailgun/email')}` (`id`) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
 ");