screensaver.cpp: use paintImage for CST...

showFrame does not work correctly on CST if Video decoder is busy, e.g streaming
no way to detect it on Coolstream yet

src/gui/screensaver.cpp

@@ -301,7 +301,11 @@ void CScreenSaver::paint()
 		}
 
 		dprintf(DEBUG_INFO, "[CScreenSaver]  %s - %d : %s\n",  __func__, __LINE__, v_bg_files.at(index).c_str());
+#if HAVE_ARM_HARDWARE
 		m_frameBuffer->showFrame(v_bg_files.at(index));
+#else
+		paintImage(v_bg_files.at(index), 0, 0, m_frameBuffer->getScreenWidth(true), m_frameBuffer->getScreenHeight(true));
+#endif
 
 		if (!g_settings.screensaver_random)
 			index++;