gdhcp: fix strict-aliasing warning

The previous way was giving the following warning with gcc 4.7:

  CC     gdhcp/common.o
gdhcp/common.c: In function 'dhcp_add_simple_option':
gdhcp/common.c:275:38: error: dereferencing type-punned pointer will
break strict-aliasing rules [-Werror=strict-aliasing

Change it slightly so not to give this warning.

diff --git a/gdhcp/common.c b/gdhcp/common.c
index 29b1f87..3c80edc 100644 (file)
--- a/gdhcp/common.c
+++ b/gdhcp/common.c
@@ -272,7 +272,7 @@ void dhcp_add_simple_option(struct dhcp_packet *packet, uint8_t code,
        data <<= 8 * (4 - len);
 #endif
 
-       dhcp_put_unaligned(data, (uint32_t *) &option[OPT_DATA]);
+       dhcp_put_unaligned(data, (uint32_t *)(option + OPT_DATA));
        dhcp_add_binary_option(packet, option);
 
        return;