Codechange: Add enum items for dynmically created setting dropdowns.

src/widgets/game_widget.h

@@ -23,6 +23,8 @@ enum GSConfigWidgets {
 	WID_GSC_CONTENT_DOWNLOAD = WID_GSC_TEXTFILE + TFT_CONTENT_END, ///< Download content button.
 	WID_GSC_ACCEPT,           ///< Accept ("Close") button
 	WID_GSC_RESET,            ///< Reset button.
+
+	WID_GSC_SETTING_DROPDOWN = -1, ///< Dynamically created dropdown for changing setting value.
 };
 
 #endif /* WIDGETS_GS_WIDGET_H */

src/widgets/newgrf_widget.h

@@ -26,6 +26,8 @@ enum NewGRFParametersWidgets {
 	WID_NP_RESET,            ///< Reset button.
 	WID_NP_SHOW_DESCRIPTION, ///< #NWID_SELECTION to optionally display parameter descriptions.
 	WID_NP_DESCRIPTION,      ///< Multi-line description of a parameter.
+
+	WID_NP_SETTING_DROPDOWN = -1, ///< Dynamically created dropdown for changing setting value.
 };
 
 /** Widgets of the #NewGRFWindow class. */

src/widgets/script_widget.h

@@ -29,6 +29,8 @@ enum ScriptSettingsWidgets {
 	WID_SCRS_SCROLLBAR,  ///< Scrollbar to scroll through all settings.
 	WID_SCRS_ACCEPT,     ///< Accept button.
 	WID_SCRS_RESET,      ///< Reset button.
+
+	WID_SCRS_SETTING_DROPDOWN = -1, ///< Dynamically created dropdown for changing setting value.
 };
 
 /** Widgets of the #ScriptDebugWindow class. */

src/widgets/settings_widget.h

@@ -64,6 +64,8 @@ enum GameSettingsWidgets {
 	WID_GS_RESTRICT_TYPE,      ///< Label upfront to the type drop-down box to restrict the list of settings to show
 	WID_GS_RESTRICT_DROPDOWN,  ///< The drop down box to restrict the list of settings
 	WID_GS_TYPE_DROPDOWN,      ///< The drop down box to choose client/game/company/all settings
+
+	WID_GS_SETTING_DROPDOWN = -1, ///< Dynamically created dropdown for changing setting value.
 };
 
 /** Widgets of the #CustomCurrencyWindow class. */