BNetworkAddressResolver: fix getting address of given family

* Fix wrong nesting of loops which are supposed to skip the first
  (*cookie) number of elements and those with the wrong address
  family

* With a start value of first = 0 (the usual case), the old code
  would always just return the first element of the addrinfo list, no
  matter which address family was actually requested

src/kits/network/libnetapi/NetworkAddressResolver.cpp

@@ -248,10 +248,11 @@ BNetworkAddressResolver::GetNextAddress(int family, uint32* cookie,
 
 	addrinfo* info = fInfo;
 	int32 first = *cookie;
-	for (int32 index = 0; index < first && info != NULL; index++) {
-		while (info != NULL && info->ai_family != family)
-			info = info->ai_next;
-	}
+	for (int32 index = 0; index < first && info != NULL; index++)
+		info = info->ai_next;
+
+	while (info != NULL && info->ai_family != family)
+		info = info->ai_next;
 
 	if (info == NULL)
 		return B_BAD_VALUE;