--- sane-frontends-1.0.14/src/xscanimage.c.badcode	2005-11-21 15:29:15.000000000 +0100
+++ sane-frontends-1.0.14/src/xscanimage.c	2005-11-21 15:33:32.000000000 +0100
@@ -1284,7 +1284,7 @@
     {				/* We are running in standalone mode */
       /* test for pnm formats */
       strncpy (testfilename, preferences.filename, sizeof (testfilename));
-      testfilename[sizeof (testfilename)] = 0;
+      testfilename[sizeof (testfilename) - 1] = 0;
       g_strreverse (testfilename);
       if (!((!strncmp (testfilename, "mnp.", 4)) ||
 	    (!strncmp (testfilename, "mgp.", 4)) ||
--- sane-frontends-1.0.14/src/xcam.c.badcode	2005-06-02 18:32:09.000000000 +0200
+++ sane-frontends-1.0.14/src/xcam.c	2005-11-21 15:32:42.000000000 +0100
@@ -1289,7 +1289,7 @@
 
       /* test for pnm formats */
       strncpy (testfilename, preferences.filename, sizeof (testfilename));
-      testfilename[sizeof (testfilename)] = 0;
+      testfilename[sizeof (testfilename) - 1] = 0;
       g_strreverse (testfilename);
       if (!((!strncmp (testfilename, "mnp.", 4)) ||
 	    (!strncmp (testfilename, "mgp.", 4)) ||