hostname: make -i not emit extra trailing space

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
diff --git a/networking/hostname.c b/networking/hostname.c
index 5f66390..d2516b5 100644
--- a/networking/hostname.c
+++ b/networking/hostname.c
@@ -153,7 +153,7 @@
 			if (hp->h_length == sizeof(struct in_addr)) {
 				struct in_addr **h_addr_list = (struct in_addr **)hp->h_addr_list;
 				while (*h_addr_list) {
-					printf("%s ", inet_ntoa(**h_addr_list));
+					printf(h_addr_list[1] ? "%s " : "%s", inet_ntoa(**h_addr_list));
 					h_addr_list++;
 				}
 				bb_putchar('\n');