[fix]: updated msg_date_sent in the batchcom (openemr#3462)

* Made the msg_date_sent column in the batchcom table NULL
* Removed the default value

sql/5_0_2-to-5_0_3_upgrade.sql

@@ -451,3 +451,7 @@ ALTER TABLE `amendments` MODIFY `created_time` timestamp NULL COMMENT 'created t
 #IfNotColumnTypeDefault amendments_history created_time timestamp NULL
 ALTER TABLE `amendments_history` MODIFY `created_time` timestamp NULL COMMENT 'created time';
 #EndIf
+
+#IfNotColumnTypeDefault batchcom msg_date_sent datetime NULL
+ALTER TABLE `batchcom` MODIFY `msg_date_sent` datetime NULL;
+#EndIf

sql/database.sql

@@ -161,7 +161,7 @@ CREATE TABLE `batchcom` (
  `msg_type` varchar(60) default NULL,
  `msg_subject` varchar(255) default NULL,
  `msg_text` mediumtext,
- `msg_date_sent` datetime NOT NULL default '0000-00-00 00:00:00',
+ `msg_date_sent` datetime NULL,
  PRIMARY KEY (`id`)
 ) ENGINE=InnoDB AUTO_INCREMENT=1 ;
 

version.php

@@ -28,7 +28,7 @@
 // is a database change in the course of development. It is used
 // internally to determine when a database upgrade is needed.
 //
-$v_database = 317;
+$v_database = 318;
 
 // Access control version identifier, this is to be incremented whenever there
 // is a access control change in the course of development. It is used