Add mathutils.geometry.delaunay_2d_cdt() function to Python API.

Provides Python API access to recently added Constrained Delaunay
Triangulation routine.
Reviewed in D5467.

source/blender/python/mathutils/mathutils.h

@@ -167,6 +167,16 @@ int mathutils_array_parse_alloc_v(float **array,
                                   int array_dim,
                                   PyObject *value,
                                   const char *error_prefix);
+int mathutils_int_array_parse(int *array,
+                              int array_dim,
+                              PyObject *value,
+                              const char *error_prefix);
+int mathutils_array_parse_alloc_vi(int **array,
+                                   int array_dim,
+                                   PyObject *value,
+                                   const char *error_prefix);
+int mathutils_array_parse_alloc_viseq(
+    int **array, int **start_table, int **len_table, PyObject *value, const char *error_prefix);
 int mathutils_any_to_rotmat(float rmat[3][3], PyObject *value, const char *error_prefix);
 
 Py_hash_t mathutils_array_hash(const float *float_array, size_t array_len);