Use newer gengetopt which also frees memory

Taken from http://sourceforge.net/tracker/index.php?func=detail&aid=1811521&group_id=68956&atid=522957
diff --git a/sgsnemu/sgsnemu.c b/sgsnemu/sgsnemu.c
index 7a3a700..9b5c2e2 100644
--- a/sgsnemu/sgsnemu.c
+++ b/sgsnemu/sgsnemu.c
@@ -245,7 +245,7 @@
   /* Try out our new parser */
   
   if (args_info.conf_arg) {
-    if (cmdline_parser_configfile (args_info.conf_arg, &args_info, 0) != 0)
+    if (cmdline_parser_configfile (args_info.conf_arg, &args_info, 0, 0, 0) != 0)
       return -1;
     if (args_info.debug_flag) {
       printf("cmdline_parser_configfile\n");