Fix buffer overflow due to incorrect strncat() usage.
http://savannah.nongnu.org/bugs/?29049

--- src/eeprom.c.orig	Mon Mar 14 23:22:50 2011
+++ src/eeprom.c	Mon Mar 14 23:25:25 2011
@@ -416,7 +416,7 @@ eeprom_dump_core (EEProm *eeprom, FILE * f_core)
             line[0] = '\0';
         }
         snprintf (buf, 80, "%02x ", storage_readb (eeprom->stor, i));
-        strncat (line, buf, 80);
+        strncat (line, buf, 80 - strlen(line) - 1);
     }
     if (dup > 0)
     {