vlib: add missing declaration for 2D point in box (backport https://trac.osgeo.org/grass/changeset/66462)

git-svn-id: https://svn.osgeo.org/grass/grass/branches/releasebranch_7_0@68206 15284696-431f-4ddb-bdfa-cd5b030d7da7

include/defs/vector.h

@@ -134,6 +134,7 @@ void Vect_destroy_boxlist(struct boxlist *);
 
 /* Bounding box (MBR) */
 int Vect_point_in_box(double, double, double, const struct bound_box *);
+int Vect_point_in_box_2d(double, double, const struct bound_box *);
 int Vect_box_overlap(const struct bound_box *, const struct bound_box *);
 int Vect_box_copy(struct bound_box *, const struct bound_box *);
 int Vect_box_extend(struct bound_box *, const struct bound_box *);