udhcpc[6]: make log2 messages for chaddr field indented like the rest

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/udhcp/d6_packet.c b/networking/udhcp/d6_packet.c
index a0656c1..493943d 100644
--- a/networking/udhcp/d6_packet.c
+++ b/networking/udhcp/d6_packet.c
@@ -18,7 +18,7 @@
 		return;
 
 	bb_error_msg(
-		"xid %x"
+		" xid %x"
 		, packet->d6_xid32
 	);
 	//*bin2hex(buf, (void *) packet->chaddr, sizeof(packet->chaddr)) = '\0';