Fix missing UIWidget::onResize handler

Signed-off-by: falkTX <falktx@falktx.com>

distrho/DistrhoInfo.hpp

@@ -562,6 +562,7 @@ START_NAMESPACE_DISTRHO
    @see Plugin::getTimePosition()
  */
 #define DISTRHO_PLUGIN_WANT_TIMEPOS 1
+
 /**
    Wherever the %UI uses a custom toolkit implementation based on OpenGL.@n
    When enabled, the macros @ref DISTRHO_UI_CUSTOM_INCLUDE_PATH and @ref DISTRHO_UI_CUSTOM_WIDGET_TYPE are required.

distrho/src/DistrhoUI.cpp

@@ -196,6 +196,8 @@ void UI::onResize(const ResizeEvent& ev)
     if (uiData->resizeInProgress)
         return;
 
+    UIWidget::onResize(ev);
+
     const uint width = ev.size.getWidth();
     const uint height = ev.size.getHeight();