docs: Fix typo.
Rename al_d3d_set_release/restore_callback to be consistent with existing naming.
Pass display to d3d device release/restore callbacks.
Make al_get_d3d_texture_size fail instead of crash if passed a non-D3D bitmap.
Make al_get_opengl_texture_size return success code to match D3D.
Add assertions to al_get_{opengl,direct3d}_texture_position.
docs: Add see alsos for GL/D3D texture size/pos functions.