comctl32/datetime: Don't check box if no valid date set.
[wine] / dlls / wineoss.drv /
drwxr-xr-x   ..
-rw-r--r-- 176 Makefile.in
-rw-r--r-- 55043 midi.c
-rw-r--r-- 25168 midipatch.c
-rw-r--r-- 6593 mmaux.c
-rw-r--r-- 82640 mmdevdrv.c
-rw-r--r-- 627 wineoss.drv.spec