fix tile size calculation

Author: wbruna

stable-diffusion.cpp

@@ -1527,7 +1527,7 @@ class StableDiffusionGGML {
             int tile_size_y    = 32;
 
             get_vae_tile_overlap(tile_overlap);
-            get_vae_tile_sizes(tile_size_x, tile_size_y, tile_overlap, x->ne[0] / 8, x->ne[1] / 8);
+            get_vae_tile_sizes(tile_size_x, tile_size_y, tile_overlap, x->ne[0], x->ne[1]);
 
             process_latent_out(x);
             // x = load_tensor_from_file(work_ctx, "wan_vae_z.bin");