winspool.drv: Avoid converting garbage if there was no DEVMODE passed in.

[Dmitry Timoshkov]

This fixes some random crashes.
---
 dlls/winspool.drv/info.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dlls/winspool.drv/info.c b/dlls/winspool.drv/info.c
index fc74e76..2ab2401 100644
--- a/dlls/winspool.drv/info.c
+++ b/dlls/winspool.drv/info.c
@@ -2410,7 +2410,7 @@ LONG WINAPI DocumentPropertiesW(HWND hWnd, HANDLE hPrinter,
 	if(ret < 0) return ret;
 	pDevModeOutputA = HeapAlloc(GetProcessHeap(), 0, ret);
     }
-    pDevModeInputA = DEVMODEdupWtoA(pDevModeInput);
+    pDevModeInputA = (fMode & DM_IN_BUFFER) ? DEVMODEdupWtoA(pDevModeInput) : NULL;
     ret = DocumentPropertiesA(hWnd, hPrinter, pDeviceNameA, pDevModeOutputA,
 			      pDevModeInputA, fMode);
     if(pDevModeOutput) {
-- 
1.8.3.1