wined3d: Only unset the onscreen depth / stencil buffer once in wined3d_device_reset().
[wine] / dlls / wineps16.drv16 /
drwxr-xr-x   ..
-rw-r--r-- 106 Makefile.in
-rw-r--r-- 3057 driver.c
-rw-r--r-- 317 wineps16.drv16.spec