libcutils: UNUSED argument warnings

Change-Id: Ie427d481298af8d911bb2b157ebba30954335354
diff --git a/libcutils/socket_local_client.c b/libcutils/socket_local_client.c
index 036ce2e..5310516 100644
--- a/libcutils/socket_local_client.c
+++ b/libcutils/socket_local_client.c
@@ -39,6 +39,8 @@
 
 #include "socket_local.h"
 
+#define UNUSED __attribute__((unused))
+
 #define LISTEN_BACKLOG 4
 
 /* Documented in header file. */
@@ -122,7 +124,7 @@
  * Used by AndroidSocketImpl
  */
 int socket_local_client_connect(int fd, const char *name, int namespaceId, 
-        int type)
+        int type UNUSED)
 {
     struct sockaddr_un addr;
     socklen_t alen;