From 55a8a64893ad2a6d303e4f33271e830a4f3da8f9 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Tue, 12 Dec 2017 16:14:59 +0100
Subject: Add an assertion

---
 libcrystfel/src/geometry.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'libcrystfel/src/geometry.c')

diff --git a/libcrystfel/src/geometry.c b/libcrystfel/src/geometry.c
index 20084476..25751abb 100644
--- a/libcrystfel/src/geometry.c
+++ b/libcrystfel/src/geometry.c
@@ -524,6 +524,7 @@ static double do_integral(double q2, double zl, double R,
 	FILE *fh = NULL;
 
 	assert(R*R < q2);
+	assert(R > 0.0);
 
 	/* Range over which P is different from zero */
 	k0 = (R*R - q2)/(2.0*(zl+R));
-- 
cgit v1.2.3