DHCP: Set option buffer length to 0 when freeing

As we test length of buffer when reallocating.
Fixes #156.

diff --git a/src/dhcp.c b/src/dhcp.c
index e24f55947070bc1cc005b2ff7400d259b3da373c..39839562645f38305ee18249db23f33723c49a96 100644 (file)
--- a/src/dhcp.c
+++ b/src/dhcp.c
@@ -3828,6 +3828,7 @@ dhcp_free(struct interface *ifp)
 
                free(ctx->opt_buffer);
                ctx->opt_buffer = NULL;
+               ctx->opt_buffer_len = 0;
        }
 }