[Freeciv-Dev] TECH_(UN)KNOWN problems in client diplomat code.

[Bursig Rafal <bursig@xxxxxxxxx>]

Hi All

When I work on my diplomat code I found some problems with tech trade 
code with player that we haven't emabssy. Till now we can offer or 
wants only unknow and reachable techs  to us or other player but 
current without emassy we don't know about other player techs 
situations. When I open meeting with other player, I can offer him all 
my tech but I know ( I run other client) that most of them he has.
I use such code but it don't work when we have no info about other 
player techs (without embassy).
if (get_invention(pPlayer0, i) == TECH_KNOWN &&
   (get_invention(pPlayer1, i) == TECH_UNKNOWN ||
    get_invention(pPlayer1, i) == TECH_REACHABLE)) {

Should client block tech exchange ability when we haven't emabssy with 
other player ?
Or there are other solutions ?

Rafal