Improves a chat error message by adding to it the protocol contact, which is concerned.

resources/languages/resources.properties

@@ -294,7 +294,7 @@ service.gui.MOVE_TO_GROUP=&Move to group
 service.gui.MOVE_CONTACT=Move Contact
 service.gui.MOVE_CONTACT_ERROR=&Contact cannot be moved
 service.gui.MSG_DELIVERY_FAILURE=The above message could not be delivered
-service.gui.MSG_DELIVERY_NOT_SUPPORTED=The protocol you are using doesn't support offline messages. You could try to reach this contact through another protocol or wait until he/she becomes online.
+service.gui.MSG_DELIVERY_NOT_SUPPORTED=The protocol you are using doesn't support offline messages. You could try to reach {0} through another protocol or wait until he/she becomes online.
 service.gui.MSG_DELIVERY_INTERNAL_ERROR=An internal error occurred. This is most probably a bug. Please report it here: http://www.jitsi.org/index.php/Development/BugsAndIssues.
 service.gui.MSG_DELIVERY_ERROR=Failed to deliver message.
 service.gui.MSG_DELIVERY_UNKNOWN_ERROR=Unknown error has occurred while delivering your message.

src/net/java/sip/communicator/impl/gui/main/chat/ChatPanel.java

@@ -1453,7 +1453,8 @@ public void messageDeliveryFailed(MessageDeliveryFailedEvent evt)
                     == MessageDeliveryFailedEvent.OFFLINE_MESSAGES_NOT_SUPPORTED)
             {
                 errorMsg = GuiActivator.getResources().getI18NString(
-                    "service.gui.MSG_DELIVERY_NOT_SUPPORTED");
+                    "service.gui.MSG_DELIVERY_NOT_SUPPORTED",
+                    new String[]{sourceContact.getDisplayName()});
             }
             else if (evt.getErrorCode()
                     == MessageDeliveryFailedEvent.NETWORK_FAILURE)

src/net/java/sip/communicator/impl/gui/main/chat/conference/ConferenceChatManager.java

@@ -392,7 +392,8 @@ public void messageDeliveryFailed(ChatRoomMessageDeliveryFailedEvent evt)
             == MessageDeliveryFailedEvent.OFFLINE_MESSAGES_NOT_SUPPORTED)
         {
             errorMsg = GuiActivator.getResources().getI18NString(
-                "service.gui.MSG_DELIVERY_NOT_SUPPORTED");
+                "service.gui.MSG_DELIVERY_NOT_SUPPORTED",
+                new String[]{destMember.getName()});
         }
         else if (evt.getErrorCode()
             == MessageDeliveryFailedEvent.NETWORK_FAILURE)
@@ -1934,7 +1935,8 @@ public void messageDeliveryFailed(
                 == MessageDeliveryFailedEvent.OFFLINE_MESSAGES_NOT_SUPPORTED)
         {
             errorMsg = GuiActivator.getResources().getI18NString(
-                    "service.gui.MSG_DELIVERY_NOT_SUPPORTED");
+                    "service.gui.MSG_DELIVERY_NOT_SUPPORTED",
+                    new String[]{destParticipant.getDisplayName()});
         }
         else if (evt.getErrorCode()
                 == MessageDeliveryFailedEvent.NETWORK_FAILURE)

src/net/java/sip/communicator/impl/gui/main/contactlist/ContactListPane.java

@@ -374,7 +374,8 @@ public void messageDeliveryFailed(MessageDeliveryFailedEvent evt)
                 == MessageDeliveryFailedEvent.OFFLINE_MESSAGES_NOT_SUPPORTED)
         {
             errorMsg = GuiActivator.getResources().getI18NString(
-                    "service.gui.MSG_DELIVERY_NOT_SUPPORTED");
+                    "service.gui.MSG_DELIVERY_NOT_SUPPORTED",
+                    new String[] {sourceContact.getDisplayName()});
         }
         else if (evt.getErrorCode()
                 == MessageDeliveryFailedEvent.NETWORK_FAILURE)