fix some indefined index

htdocs/contact/class/contact.class.php

@@ -246,11 +246,11 @@ class Contact extends CommonObject
 		$sql .= ", poste='".$this->db->escape($this->poste)."'";
 		$sql .= ", fax='".$this->db->escape($this->fax)."'";
 		$sql .= ", email='".$this->db->escape($this->email)."'";
-		$sql .= ", note='".$this->db->escape($this->note)."'";
-		$sql .= ", phone = '".$this->db->escape($this->phone_pro)."'";
-		$sql .= ", phone_perso = '".$this->db->escape($this->phone_perso)."'";
-		$sql .= ", phone_mobile = '".$this->db->escape($this->phone_mobile)."'";
-		$sql .= ", jabberid = '".$this->db->escape($this->jabberid)."'";
+		$sql .= ", note='".(isset($this->db->escape($this->note))?"'".$this->db->escape($this->note))."'":"null")."'";
+		$sql .= ", phone = '".(isset($this->db->escape($this->phone_pro))?"'".$this->db->escape($this->phone_pro))."'":"null")."'";
+		$sql .= ", phone_perso = '".(isset($this->db->escape($this->phone_perso))?"'".$this->db->escape($this->phone_perso))."'":"null")."'";
+		$sql .= ", phone_mobile = '".(isset($this->db->escape($this->phone_mobile))?"'".$this->db->escape($this->phone_mobile))."'":"null")."'";
+		$sql .= ", jabberid = '".(isset($this->db->escape($this->jabberid))?"'".$this->db->escape($this->jabberid))."'":"null")."'";
 		$sql .= ", priv = '".$this->priv."'";
 		$sql .= ", fk_user_modif=".($user->id > 0 ? "'".$user->id."'":"null");
 		$sql .= ", default_lang=".($this->default_lang?"'".$this->default_lang."'":"null");