gdi32: return non-zero v-refresh value for display devices.

[Akihiro Sagawa]

To avoid division by zero (Bug 43369).

Signed-off-by: Akihiro Sagawa <sagawa.aki at gmail.com>
---
 dlls/gdi32/driver.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

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