Merge pull request #947 from enkiller/gui_img_png_c

[GUI]解决找不到image_png.h的问题

components/gui/src/image_png.c

@@ -424,7 +424,7 @@ void rtgui_image_png_init()
 
 #elif defined(RTGUI_IMAGE_LODEPNG)
 #include "lodepng.h"
-#include <rtgui/image_png.h>
+#include <rtgui/image.h>
 
 static rt_bool_t rtgui_image_png_check(struct rtgui_filerw *file);
 static rt_bool_t rtgui_image_png_load(struct rtgui_image *image, struct rtgui_filerw *file, rt_bool_t load);