[PATCH iproute2] Fix compile warning in get_addr_1

[David Ahern <dsa@cumulusnetworks.com>]

A recent cleanup causes a compile warning on Debian jessie:

    CC       utils.o
utils.c: In function ‘get_addr_1’:
utils.c:486:21: warning: passing argument 1 of ‘ll_addr_a2n’ from incompatible pointer type
   len = ll_addr_a2n(&addr->data, sizeof(addr->data), name);
                     ^
In file included from utils.c:34:0:
../include/rt_names.h:27:5: note: expected ‘char *’ but argument is of type ‘__u32 (*)[8]’
 int ll_addr_a2n(char *lladdr, int len, const char *arg);
     ^

Revert the removal of the typecast

Fixes: e1933b928125 ("utils: cleanup style")
Signed-off-by: David Ahern <dsa@cumulusnetworks.com>
---
 lib/utils.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/utils.c b/lib/utils.c
index 316b048abcfc..83c9d097c608 100644
--- a/lib/utils.c
+++ b/lib/utils.c
@@ -483,7 +483,8 @@ int get_addr_1(inet_prefix *addr, const char *name, int family)
 	if (family == AF_PACKET) {
 		int len;
 
-		len = ll_addr_a2n(&addr->data, sizeof(addr->data), name);
+		len = ll_addr_a2n((char *) &addr->data, sizeof(addr->data),
+				  name);
 		if (len < 0)
 			return -1;
 
-- 
2.1.4