nitlog: Fixed adaptation to changed nitpicker API

Fixes #955

demo/src/server/nitlog/main.cc

@@ -345,7 +345,8 @@ int main(int argc, char **argv)
 	static Nitpicker::Connection nitpicker;
 	static     Timer::Connection timer;
 
-	nitpicker.buffer(Framebuffer::Mode(LOG_W, LOG_H, Framebuffer::Mode::RGB565), false);
+	nitpicker.buffer(Framebuffer::Mode(log_win_w, log_win_h,
+	                 Framebuffer::Mode::RGB565), false);
 
 	/* initialize entry point that serves the root interface */
 	enum { STACK_SIZE = 4096 };