add non-const iterators to sparse vector, speed up model1 code

1 files changed, 1 insertions, 1 deletions

diff --git a/utils/ccrp_onetable.h b/utils/ccrp_onetable.h
index 1fe01b0e..abe399ea 100644
--- a/utils/ccrp_onetable.h
+++ b/utils/ccrp_onetable.h
@@ -183,7 +183,7 @@ class CCRP_OneTable {
     assert(has_discount_prior() || has_alpha_prior());
     DiscountResampler dr(*this);
     ConcentrationResampler cr(*this);
-    for (int iter = 0; iter < nloop; ++iter) {
+    for (unsigned iter = 0; iter < nloop; ++iter) {
       if (has_alpha_prior()) {
         alpha_ = slice_sampler1d(cr, alpha_, *rng, 0.0,
                                std::numeric_limits<double>::infinity(), 0.0, niterations, 100*niterations);