Fix a cast warning on DragonflyBSD

diff --git a/src/if-options.c b/src/if-options.c
index 06ef1cb8a6d53c187939f9d6361d772faf8ab3b3..1b256fa9afa17970381264632d4ba0ceaa2caaca 100644 (file)
--- a/src/if-options.c
+++ b/src/if-options.c
@@ -1084,7 +1084,7 @@ parse_option(struct dhcpcd_ctx *ctx, const char *ifname, struct if_options *ifo,
                }
 
                arg = p + 1;
-               s = sizeof(ifo->vendor) - 1 - ifo->vendor[0] - 2;
+               s = (ssize_t)sizeof(ifo->vendor) - 1 - ifo->vendor[0] - 2;
                if (inet_aton(arg, &addr) == 1) {
                        if (s < 6) {
                                s = -1;