Ajout paramatre do pour gerer l'imbrication de plusieures transactions

htdocs/lib/mysql.lib.php

@@ -109,20 +109,29 @@ class DoliDb {
     return $this->ret;
   }
 
-  Function begin()
+  Function begin($do=1)
+  {
+    if ($do)
       {
 	return $this->query("BEGIN");
       }
+  }
 
-  Function commit()
+  Function commit($do=1)
+  {
+    if ($do)
       {
 	return $this->query("COMMIT");
       }
+  }
 
-  Function rollback()
+  Function rollback($do=1)
+  {
+    if ($do)
       {
 	return $this->query("ROLLBACK");
       }
+  }
 
   Function query($query, $limit="", $offset="")
     {