vlib: typo in doxygen docs

git-svn-id: https://svn.osgeo.org/grass/grass/trunk@47747 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/vect/dig_structs.h

@@ -1048,7 +1048,7 @@ struct Map_info
       
       - GV_FORMAT_NATIVE
       - GV_FORMAT_OGR
-      - GV_FORMAT_DIRECT
+      - GV_FORMAT_OGR_DIRECT
     */
     int format;
     /*!