[glom] Fix the build

[Murray Cumming <murrayc src gnome org>]

commit 2869c341d4d8e620ed9326ce4e8100377127ca90
Author: Murray Cumming <murrayc murrayc com>
Date:   Tue Nov 19 14:30:51 2013 +0100

    Fix the build

 tests/import/utils.cc |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/tests/import/utils.cc b/tests/import/utils.cc
index ad0445d..cf2ce3f 100644
--- a/tests/import/utils.cc
+++ b/tests/import/utils.cc
@@ -40,7 +40,7 @@ static Glib::ustring create_file_from_buffer(const char* input, guint input_size
   catch(const Gio::Error& ex)
   {
     std::cerr << G_STRFUNC << ": Gio::File::write() failed: " << ex.what() << std::endl;
-    return false;
+    return std::string();
   }
 
   return file_uri;