clutter-ply-data: Use g_filename_display_name for error reporting
clutter-ply-data: Use g_filename_display_name for error reporting

Instead of trying to convert the filename to UTF-8 with
g_filename_to_utf8 and an error fallback, it's much simpler to just
use g_filename_display_name.

eliasbakken/mash,clutter-project/mash,clutter-project/mash,clutter-project/mash,eliasbakken/mash