PyArray_FromDims --> PyArray_SimpleNew

ltot = (PyArrayObject *) PyArray_FromDims(1,ld,PyArray_FLOAT);

npy_intp ld[1]; out = (PyArrayObject *) PyArray_SimpleNew(idx->nd,idx->dimensions,NPY_FLOAT);

#include <numpy/libnumarray.h>

numpy/arrayobject.h