Compile fixes for mingw32

src/framework/thirdparty/apngloader.cpp

@@ -917,7 +917,7 @@ void write_IDATs(std::ostream& f, unsigned char* data, unsigned int length, unsi
     }
 }
 
-void save_png(std::stringstream& f, int width, int height, int channels, unsigned char *pixels)
+void save_png(std::stringstream& f, unsigned int width, unsigned int height, int channels, unsigned char *pixels)
 {
     unsigned int bpp = 4;
     unsigned char coltype = 0;

src/framework/ui/uimanager.cpp

@@ -278,7 +278,7 @@ void UIManager::onWidgetDestroy(const UIWidgetPtr& widget)
     if(m_checkEvent && !m_checkEvent->isExecuted())
         return;
 
-    m_checkEvent = g_eventDispatcher.scheduleEvent([] {
+    m_checkEvent = g_eventDispatcher.scheduleEvent([this] {
         g_lua.collectGarbage();
         UIWidgetList backupList = m_destroyedWidgets;
         m_destroyedWidgets.clear();