Fix all the compile warnings that occur on Mac.

(Except the OpenGL deprecation warning and some warnings coming from Boost.Process.)

src/dialogxml/dialogs/dialog.cpp

@@ -1185,7 +1185,7 @@ void preview_dialog_xml(fs::path dialog_xml) {
 		// Make every clickable control's click event close the dialog
 		for (auto control : dialog){
 			try{
-				control.second->attachClickHandler([](cDialog& me, std::string item_hit, eKeyMod mod) -> bool {
+				control.second->attachClickHandler([](cDialog& me, std::string, eKeyMod) -> bool {
 					me.toast(false);
 					return true;
 				});

src/dialogxml/widgets/button.cpp

@@ -324,5 +324,8 @@ void cButton::initPreset() {
 		case BTN_TRAIT:
 			setText("Race|& Traits");
 			break;
+		default:
+			// Other button types don't have prebaked text, so do nothing
+			break;
 	}
 }