core: Fix size check to match comment

Change-Id: I924e5dac387c2dee078bc0fac4bdbebda242c997
Signed-off-by: Matt Johnston <matt@codeconstruct.com.au>
diff --git a/core.c b/core.c
index 32cfd00..9247b53 100644
--- a/core.c
+++ b/core.c
@@ -549,7 +549,7 @@
 	assert(bus);
 
 	/* Drop packet if it was smaller than mctp hdr size */
-	if (mctp_pktbuf_size(pkt) <= sizeof(struct mctp_hdr))
+	if (mctp_pktbuf_size(pkt) < sizeof(struct mctp_hdr))
 		goto out;
 
 	if (mctp->capture)