From d4c2b878f51668b1dce4c05a884138064f65cfa0 Mon Sep 17 00:00:00 2001
From: Tim Edwards <tim@opencircuitdesign.com>
Date: Thu, 28 May 2020 21:10:42 -0400
Subject: [PATCH] Fixing the same problem again. . . actual mechanism was
 slightly different than I expected.

---
 database/DBio.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/database/DBio.c b/database/DBio.c
index 50a5ab79..c5f2a5ee 100644
--- a/database/DBio.c
+++ b/database/DBio.c
@@ -2736,7 +2736,8 @@ DBCellWrite(cellDef, fileName)
     /* surprises can occur after saving a file as a different	    */
     /* filename.						    */
 
-    StrDup(&cellDef->cd_file, fileName);
+    if (fileName != cellDef->cd_file)
+	StrDup(&cellDef->cd_file, fileName);
 
     /* The cd_file should not have the .mag suffix, but make sure   */
     /* it doesn't before adding one.				    */