[fallin] undo changes which put background on top

src/demo/fallin.c

@@ -183,31 +183,18 @@ int fallin_demo(struct notcurses* nc){
       x += newx;
     }
   }
-  struct ncplane* n = NULL;
+  ncplane_erase(stdn);
 #ifndef DFSG_BUILD
   if(notcurses_canopen_images(nc)){
   char* path = find_data("lamepatents.jpg");
-    if(path == NULL){
-      goto err;
-    }
   struct ncvisual* ncv = ncvisual_from_file(path);
   free(path);
   if(ncv == NULL){
     goto err;
   }
-    struct ncplane_options nopts = {
-      .rows = dimy - 2,
-      .cols = dimx,
-      .y = 1,
-    };
-    n = ncplane_create(stdn, &nopts);
-    if(n == NULL){
-      goto err;
-    }
   struct ncvisual_options vopts = {
+    .n = stdn,
     .scaling = NCSCALE_STRETCH,
-      //.blitter = NCBLIT_PIXEL,
-      .n = n,
   };
   if(ncvisual_render(nc, ncv, &vopts) == NULL){
     ncvisual_destroy(ncv);
@@ -220,7 +207,6 @@ int fallin_demo(struct notcurses* nc){
   int ret = drop_bricks(nc, arr, arrcount);
   free(arr);
   free(usemap);
-  ncplane_destroy(n);
   return ret;
 
 err: