fix build on eoan

src/commands.hxx

@@ -48,7 +48,8 @@ inline QString demangle(const char* mangled) {
   return QString(mangled);
 }
 #endif
-
+/* redefinition of ‘class std::optional<_Tp>’ */
+/*
 namespace std {
   template<typename T> class optional {
     private:
@@ -87,6 +88,7 @@ namespace std {
       }
   };
 }
+*/
 
 class Script;
 class Command;

src/testgui.hxx

@@ -11,6 +11,8 @@
 #include <editor.hxx>
 #include <commands.hxx>
 #include <scriptfile.hxx>
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wconversion"
 #include <QMainWindow>
 #include <QSettings>
 #include <QWebFrame>
@@ -22,9 +24,10 @@
 #include <QShortcut>
 #include <QCompleter>
 #include <ui_testgui.hxx>
-#include <stdexcept>
 #include <QNetworkReply>
 #include <QEvent>
+#pragma GCC diagnostic pop
+#include <stdexcept>
 #include <mrw/stdext.hxx>
 
 class TestGUI: public QMainWindow, protected Ui::TestGUI {