On Session restore, set the correct startup project

Task-number: QTCREATORBUG-7161
Change-Id: Ie83961b35f2d7d4419a519a2fe6e4df601a67d1c
Reviewed-by: Daniel Teske <daniel.teske@nokia.com>

src/plugins/projectexplorer/session.cpp

@@ -759,7 +759,7 @@ void SessionManager::restoreStartupProject(const Utils::PersistentSettingsReader
         const QString startupProjectPath = startupProject;
         foreach (Project *pro, m_projects) {
             if (QDir::cleanPath(pro->document()->fileName()) == startupProjectPath) {
-                setStartupProject(m_startupProject);
+                setStartupProject(pro);
                 break;
             }
         }