From 74584c94eeca4a0ba460102042d5077669a02d32 Mon Sep 17 00:00:00 2001
From: Holger Vogt <holger.vogt@uni-due.de>
Date: Sat, 19 May 2018 15:37:03 +0200
Subject: [PATCH] prevent false reading after copying an empty file

---
 src/frontend/inp.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontend/inp.c b/src/frontend/inp.c
index 4affda156..90fdd0f61 100644
--- a/src/frontend/inp.c
+++ b/src/frontend/inp.c
@@ -1498,7 +1498,7 @@ create_circbyline(char *line)
     if (linec < memlen) {
         if (ciprefix(".end", line) && (line[4] == '\0' || isspace_c(line[4]))) {
             circarray[linec] = NULL;
-            inp_spsource(fp, FALSE, "", TRUE);
+            inp_spsource(fp, FALSE, NULL, TRUE);
             linec = 0;
         }
     }