plugins/elements/: Also check for an absolute path following file:// in the filesrc...

plugins/elements/: Also check for an absolute path following file:// in the filesrc element. Remove redundant check a...

Original commit message from CVS:
* plugins/elements/gstfilesink.c: (gst_file_sink_uri_set_uri):
* plugins/elements/gstfilesrc.c: (gst_file_src_uri_set_uri):
Also check for an absolute path following file:// in the filesrc
element. Remove redundant check and call g_path_is_absolute() on the
unescaped location.