Original commit message from CVS:
* gst/glib-compat-private.h:
Add compatibility macro for g_intern_string() for
GLib-2.8 (any reason we can't just bump the
requirement to at least 2.10?)
* gst/gstpadtemplate.h:
* gst/gstelementfactory.c:
* gst/gstregistryxml.c:
* gst/gstregistrybinary.c:
Make GstStaticPadTemplate's templ_name field a const gchar * and fix
up the internal code accordingly.  This shouldn't be a problem, since
there is no reason external code could ever assume the string in such
a structure is dynamically allocated unless it did that itself;  the
use of g_strdup() is private to element factories.  The new code also
saves some memory by putting pad template name strings into the GLib
quark table instead of allocating them dynamically.
Declaring this field constant fixes warnings with g++-4.2 when using
the GST_STATIC_PAD_TEMPLATE macro in c++ code (#478092).