[visual] use absolute coordinate in diagnostic

src/demo/yield.c

@@ -164,6 +164,11 @@ int yield_demo(struct notcurses* nc){
   const bool bitmaps = notcurses_canpixel(nc);
   struct ncplane_options nopts = {
     .y = 1,
+    // this chops one line off the bottom that we could use in the case
+    // of kitty graphics (xterm can't draw on the bottom row without
+    // scrolling). this doesn't hit clamping thresholds since we're
+    // starting on row 1. what we really need is a valid story for trimming
+    // sprixels which cross the bottom row, see #2195.
     .rows = dimy - 1 - bitmaps, // FIXME
     .cols = dimx,
     .name = "wmap",

src/lib/visual.c

@@ -1132,7 +1132,7 @@ ncplane* ncvisual_blit(notcurses* nc, ncvisual* ncv, const struct ncvisual_optio
     placey = 0;
     placex = 0;
   }
-  logdebug("blit to plane %p at %d/%d geom %dx%d\n", n, ncplane_y(n), ncplane_x(n), ncplane_dim_y(n), ncplane_dim_x(n));
+  logdebug("blit to plane %p at %d/%d geom %dx%d\n", n, ncplane_abs_y(n), ncplane_abs_x(n), ncplane_dim_y(n), ncplane_dim_x(n));
   if(geom.blitter != NCBLIT_PIXEL){
     n = ncvisual_render_cells(ncv, bset, placey, placex,
                               &geom, n, vopts->flags, transcolor);