Mac OS X love...

Mac OS X love...

Original commit message from CVS:
2008-04-11  Julien Moutte  <julien@fluendo.com>

Mac OS X love...
* configure.ac: Merge platform specific defines, introduce a new
define on OS X to remember that forking when updating registry is
unsafe.
* docs/faq/gst-uninstalled: Updated to include gst-libs in the bad
module.
* gst/gst.c: Don't fork when updating registry if GST_HAVE_UNSAFE_FORK
is defined.
* gst/gstregistry.c: (gst_registry_scan_path_level): Fixed a bogus
condition that leads to absolutely no plugins being registered on
OS X.