Failed to detect ecosystem of selected island, fix missing plants in palette, kaetemi/ryzomclassic#132

ryzom/common/data_common/r2/r2_ui_acts.lua

@@ -1240,11 +1240,13 @@ function r2.acts:updatePaletteFromEcosystem()
 		-- search for ecosystem of current location
 		local islandEcosystem
 		for ecoName, v in pairs(self.islands) do
+			if self.islands[ecoName][self:getIslandNb(currentLocation.IslandName)] then
 				if self.islands[ecoName][self:getIslandNb(currentLocation.IslandName)].name==currentLocation.IslandName then
 					islandEcosystem = ecoName
 					break
 				end
 			end
+		end
 
 		-- flag to display only vegetation of current ecosystem
 		if islandEcosystem and ecosystemTrees[islandEcosystem] then