comctl32/datetime: Don't check box if no valid date set.
[wine] / dlls / winealsa.drv /
drwxr-xr-x   ..
-rw-r--r-- 153 Makefile.in
-rw-r--r-- 46300 midi.c
-rw-r--r-- 101218 mmdevdrv.c
-rw-r--r-- 559 winealsa.drv.spec