From df354511a0f4a923827e45edcafcb51343d10ea8 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Thu, 8 Aug 2019 15:40:32 +0200
Subject: rtnl_mtx_print and intmat_print: Handle NULL matrix

---
 libcrystfel/src/integer_matrix.c | 5 +++++
 libcrystfel/src/rational.c       | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/libcrystfel/src/integer_matrix.c b/libcrystfel/src/integer_matrix.c
index 1d1c3a47..9431d189 100644
--- a/libcrystfel/src/integer_matrix.c
+++ b/libcrystfel/src/integer_matrix.c
@@ -406,6 +406,11 @@ void intmat_print(const IntegerMatrix *m)
 {
 	unsigned int i, j;
 
+	if ( m == NULL ) {
+		fprintf(stderr, "(NULL matrix)\n");
+		return;
+	}
+
 	for ( i=0; i<m->rows; i++ ) {
 
 		fprintf(stderr, "[ ");
diff --git a/libcrystfel/src/rational.c b/libcrystfel/src/rational.c
index 88a485ff..fe87c034 100644
--- a/libcrystfel/src/rational.c
+++ b/libcrystfel/src/rational.c
@@ -510,6 +510,11 @@ void rtnl_mtx_print(const RationalMatrix *m)
 {
 	unsigned int i, j;
 
+	if ( m == NULL ) {
+		fprintf(stderr, "(NULL matrix)\n");
+		return;
+	}
+
 	for ( i=0; i<m->rows; i++ ) {
 
 		fprintf(stderr, "[ ");
-- 
cgit v1.2.3