Silencing sizeof() warning

Here, the sizeof() function return the size of 'char *' instead of 
INTF_NAME_LEN. I replaced the use of the latter function by INTF_NAME_LEN 
(maximum size of the array intf_name). Here is the compiler warning output:

route-bsd.c:171:38: warning: sizeof on array function parameter will return 
size of 'char *' instead of 'char [16]' [-Wsizeof-array-argument] 
strlcpy(intf_name, namebuf, sizeof(intf_name));

libdnet-stripped/src/route-bsd.c

@@ -168,7 +168,7 @@ route_msg(route_t *r, int type, char intf_name[INTF_NAME_LEN], struct addr *dst,
 				errno = ESRCH;
 				return (-1);
 			}
-			strlcpy(intf_name, namebuf, sizeof(intf_name));
+			strlcpy(intf_name, namebuf, INTF_NAME_LEN);
 		}
 	}
 	return (0);