[PATCH] comdlg32: Improve error handling in get_config_key_string.

[Jacek Caban]

Signed-off-by: Jacek Caban <jacek(a)codeweavers.com>
---
  dlls/comdlg32/filedlg.c | 9 ++++-----
  1 file changed, 4 insertions(+), 5 deletions(-)