[glom] Allow use of example documents that mention an unsupported backend.

[Murray Cumming <murrayc src gnome org>]

commit 255ada87d0329ffae3ffc39db50e4aa9984377f7
Author: Murray Cumming <murrayc murrayc com>
Date:   Thu Dec 3 09:38:18 2009 +0100

    Allow use of example documents that mention an unsupported backend.
    
    * glom/application.cc: check_document_hosting_mode_is_supported():
    Don't check the backend if it is an example document because the user
    will choose it when saving anyway.

 ChangeLog           |    8 ++++++++
 glom/application.cc |    5 +++++
 2 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/ChangeLog b/ChangeLog
index 44fa10d..5686b77 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,11 @@
+2009-12-03  Murray Cumming  <murrayc murrayc com>
+
+	Allow use of example documents that mention an unsupported backend.
+
+	* glom/application.cc: check_document_hosting_mode_is_supported():
+	Don't check the backend if it is an example document because the user 
+	will choose it when saving anyway.
+
 2009-11-17  Murray Cumming  <murrayc murrayc com>
 
 	tests: dtd: Now passes.
diff --git a/glom/application.cc b/glom/application.cc
index 69f402a..d935334 100644
--- a/glom/application.cc
+++ b/glom/application.cc
@@ -892,6 +892,11 @@ void App_Glom::init_create_document()
 
 bool App_Glom::check_document_hosting_mode_is_supported(Document* document)
 {
+  //If it's an example then the document's hosting mode doesn't matter, 
+  //because the user will be asked to choose one when saving anyway.
+  if(document->get_is_example_file())
+    return true;
+
   //Check that the file's hosting mode is supported by this build:
   Glib::ustring error_message;
   switch(document->get_hosting_mode())