Fix windows crash at startup, again...

... The fix done at 2f9322e was undone at 43b1afc because of the unacceptable
file dependencies.  This fixes it by other means.  Make a null check in
SetProjectTitle in case it is invoked before ProjectWindow has been constructed;
also ensure in ProjectManager::New that it is called at least once after that.

src/ProjectFileIO.cpp

@@ -103,7 +103,10 @@ void ProjectFileIO::UpdatePrefs()
 void ProjectFileIO::SetProjectTitle( int number)
 {
    auto &project = mProject;
-   auto &window = GetProjectFrame( project );
+   auto pWindow = project.GetFrame();
+   if ( !pWindow )
+      return;
+   auto &window = *pWindow;
    wxString name = project.GetProjectName();
 
    // If we are showing project numbers, then we also explicitly show "<untitled>" if there

src/ProjectManager.cpp

@@ -360,6 +360,8 @@ AudacityProject *ProjectManager::New()
    auto &projectManager = Get( project );
    auto &window = ProjectWindow::Get( *p );
    window.Init();
+
+   ProjectFileIO::Get( *p ).SetProjectTitle();
    
    MissingAliasFilesDialog::SetShouldShow(true);
    MenuManager::Get( project ).CreateMenusAndCommands( project );