Merge pull request #1156 from vanwinkeljan/fix_disp_lv_inv_area

Pass disp->driver to rounder_cb in lv_inv_area

src/lv_core/lv_refr.c

@@ -115,7 +115,7 @@ void lv_inv_area(lv_disp_t * disp, const lv_area_t * area_p)
 
     /*The area is truncated to the screen*/
     if(suc != false) {
-        if(disp->driver.rounder_cb) disp->driver.rounder_cb(&disp_refr->driver, &com_area);
+        if(disp->driver.rounder_cb) disp->driver.rounder_cb(&disp->driver, &com_area);
 
         /*Save only if this area is not in one of the saved areas*/
         uint16_t i;