Now color_adjust takes three arguments instead of a config

Consider it part of the public API now.

data/lua/core.lua

@@ -899,8 +899,9 @@ if wesnoth.kernel_type() == "Game Lua Kernel" then
 	wesnoth.get_displayed_unit = wesnoth.deprecate_api('wesnoth.get_displayed_unit', 'wesnoth.interface.get_displayed_unit', 1, nil, wesnoth.interface.get_displayed_unit)
 	wesnoth.zoom = wesnoth.deprecate_api('wesnoth.zoom', 'wesnoth.interface.zoom', 1, nil, wesnoth.interface.zoom)
 	wesnoth.gamestate_inspector = wesnoth.deprecate_api('wesnoth.gamestate_inspector', 'gui.show_inspector', 1, nil, gui.show_inspector)
+	-- wesnoth.wml_actions.color_adjust doesn't exist yet at this point, so create a helper function instead.
+	wesnoth.color_adjust = deprecate_api('wesnoth.color_adjust', 'wesnoth.interface.color_adjust', 1, nil, wesnoth.wml_actions.color_adjust)
 	-- No deprecation for these since since they're not actually public API yet
-	wesnoth.color_adjust = wesnoth.interface.color_adjust
 	wesnoth.set_menu_item = wesnoth.interface.set_menu_item
 	wesnoth.clear_menu_item = wesnoth.interface.clear_menu_item
 	-- Units module

data/lua/wml-tags.lua

@@ -757,7 +757,7 @@ function wml_actions.scroll(cfg)
 end
 
 function wml_actions.color_adjust(cfg)
-	wesnoth.interface.color_adjust(cfg)
+	wesnoth.interface.color_adjust(cfg.red, cfg.green, cfg.blue)
 end
 
 function wml_actions.end_turn(cfg)

src/scripting/game_lua_kernel.cpp

@@ -3408,9 +3408,7 @@ int game_lua_kernel::intf_remove_event(lua_State *L)
 int game_lua_kernel::intf_color_adjust(lua_State *L)
 {
 	if (game_display_) {
-		vconfig cfg(luaW_checkvconfig(L, 1));
-
-		game_display_->adjust_color_overlay(cfg["red"], cfg["green"], cfg["blue"]);
+		game_display_->adjust_color_overlay(luaL_checkinteger(L, 1), luaL_checkinteger(L, 2), luaL_checkinteger(L, 3));
 		game_display_->invalidate_all();
 		game_display_->draw(true,true);
 	}