noncart/nufft: properly propagate the lowmem flag
Otherwise, it will not be used in the calculation of the psf, which can
often be the largest nufft performed.
@@ -261,6 +261,7 @@ complex float* compute_psf(unsigned int N, const long img_dims[N], const long tr
struct nufft_conf_s conf = nufft_conf_defaults;
conf.periodic = periodic;
conf.toeplitz = false; // avoid infinite loop
+ conf.lowmem = lowmem;
debug_printf(DP_DEBUG2, "nufft kernel dims: ");
