vlib/dox: fixing vector FAQ (missing comment end)

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@55456 15284696-431f-4ddb-bdfa-cd5b030d7da7

lib/vector/vectorlib_faq.dox

@@ -255,4 +255,4 @@ libraries.
 
 </dl>
 
-
+*/