fix name of 'extra_opts' structure member (Nikolai Malykh)
diff --git a/extensions/libipt_dstlimit.c b/extensions/libipt_dstlimit.c
index c4e90c6..0d4dc09 100644
--- a/extensions/libipt_dstlimit.c
+++ b/extensions/libipt_dstlimit.c
@@ -333,7 +333,7 @@
 	.final_check	= &final_check,
 	.print 		= &print,
 	.save		= &save,
-	.opts_extra	= opts
+	.extra_opts	= opts
 };
 
 void _init(void)