message: Use proper buffer sizes
diff: @@ -351,10 +351,10 @@ namespace vks
  VkBufferCopy copyRegion{};
  - copyRegion.size = vertices.size;
  + copyRegion.size = vBufferSize;
  vkCmdCopyBuffer(copyCmd, vertexStaging.buffer, vertices.buffer, 1, &copyRegion);
  - copyRegion.size = indices.size;
  + copyRegion.size = iBufferSize;
  vkCmdCopyBuffer(copyCmd, indexStaging.buffer, indices.buffer, 1, &copyRegion);
  device->flushCommandBuffer(copyCmd, copyQueue);
  