Userscripts.org

Line 386

Replace:
var tavernWineUsage = [0, 3, 5, 8, 11, 14, 17, 21, 25, 29, 33, 38, 42, 47, 52, 57, 63, 68];

With:
var tavernWineUsage = [0, 3, 5, 8, 11, 14, 17, 21, 25, 29, 33, 38, 42, 47, 52, 57, 63, 68, 73];

Updated Line for Version 0.3.0 of the game & also added level 19 tavern.

var tavernWineUsage = [0, 4, 8, 13, 18, 24, 30, 37, 44, 51, 60, 68, 78, 88, 99, 110, 122, 136, 150, 165];

If you go by the values obtained from the Ikariam Wiki on Patch 0.3.0/Tavern, located here:

http://ikariam.wikia.com/wiki/Patch_0.3.0/Tavern

The actual line should be:

var tavernWineUsage = [0, 4, 8, 13, 18, 24, 30, 37, 44, 51, 60, 68, 78, 88, 99, 110, 122, 136, 150, 165, 180, 197, 216, 235, 255];

var tavernWineUsage = [0, 4, 8, 13, 18, 24, 30, 37, 44, 51, 60, 68, 78, 88, 99, 110, 122, 136, 150, 165, 180, 197, 216, 235, 255, 277, 300, 325];