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py-cvec.c: cvec.length to return the actual length

--- a/interfaces/python/py-cvec.c

+++ b/interfaces/python/py-cvec.c

@@ -28,7 +28,7 @@

   self = (Py_cvec *) type->tp_alloc (type, 0);

-  self->length = Py_default_vector_length;

+  self->length = Py_default_vector_length / 2 + 1;

   self->channels = Py_default_vector_channels;

   if (self == NULL) {

@@ -36,7 +36,7 @@

   }

   if (length > 0) {

-    self->length = length;

+    self->length = length / 2 + 1;

   } else if (length < 0) {

     PyErr_SetString (PyExc_ValueError,

         "can not use negative number of elements");

@@ -57,7 +57,7 @@

 static int

 Py_cvec_init (Py_cvec * self, PyObject * args, PyObject * kwds)

 {

-  self->o = new_cvec (self->length, self->channels);

+  self->o = new_cvec ((self->length - 1) * 2, self->channels);

   if (self->o == NULL) {

     return -1;

   }