From 70b43bb7270ab73a24ed452396baad90df4457e3 Mon Sep 17 00:00:00 2001
From: Luke Shingles <luke.shingles@gmail.com>
Date: Mon, 2 Sep 2024 00:24:12 +0100
Subject: [PATCH] Update nonthermal.cc

---
 nonthermal.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/nonthermal.cc b/nonthermal.cc
index ed3d690dc..4b9d4115b 100644
--- a/nonthermal.cc
+++ b/nonthermal.cc
@@ -912,8 +912,8 @@ auto calculate_frac_heating(const int modelgridindex, const std::array<double, S
 
   double N_e_contrib = 0.;
   // third term (integral from zero to SF_EMIN)
-  const int nsteps = static_cast<int>(std::ceil(SF_EMIN / DELTA_E) * 10);
-  assert_always(nsteps > 0);
+  constexpr int nsteps = (static_cast<int>(SF_EMIN / DELTA_E) + 1) * 10;
+  static_assert(nsteps > 0);
   const double delta_endash = SF_EMIN / nsteps;
   for (int j = 0; j < nsteps; j++) {
     const double endash = SF_EMIN * j / nsteps;