v.type manual: ref to v.centroids added

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@73936 15284696-431f-4ddb-bdfa-cd5b030d7da7

vector/v.type/v.type.html

@@ -9,8 +9,14 @@
 v.type input=map_l output=map_b from_type=line to_type=boundary
 </pre></div>
 
+In order to create areas, centroids must be added with <b>v.centroids</b>.
+
 <h2>SEE ALSO</h2>
-<em><a href="v.to.points.html">v.to.points</a></em>
+
+<em>
+<a href="v.centroids.html">v.centroids</a>,
+<a href="v.to.points.html">v.to.points</a>
+</em>
 
 <h2>AUTHOR</h2>