check/pipelines/simple_launch_lines.c: test for pipe!=NULL

check/pipelines/simple_launch_lines.c: test for pipe!=NULL

Original commit message from CVS:
* check/pipelines/simple_launch_lines.c: (run_pipeline):
test for pipe!=NULL
* docs/gst/tmpl/.cvsignore:
* docs/gst/tmpl/gstmemchunk.sgml:
* docs/gst/tmpl/gstparse.sgml:
* docs/gst/tmpl/gsttaglist.sgml:
* docs/gst/tmpl/gsttagsetter.sgml:
* docs/gst/tmpl/gsttypefind.sgml:
* docs/gst/tmpl/gsttypefindfactory.sgml:
* gst/gstmemchunk.c:
* gst/gstparse.c:
* gst/gsttag.c:
* gst/gsttaginterface.c:
* gst/gsttypefind.c:
* gst/gsttypefind.h:
inlined more docs