setupapi: Fix return behaviour when the device key doesn't exist.

dlls/setupapi/devinst.c

@@ -3728,8 +3728,13 @@ static HKEY SETUPDI_OpenDrvKey(struct DeviceInfo *devInfo, REGSAM samDesired)
         WCHAR devId[10];
 
         sprintfW(devId, fmt, devInfo->devId);
-        RegOpenKeyExW(classKey, devId, 0, samDesired, &key);
+        l = RegOpenKeyExW(classKey, devId, 0, samDesired, &key);
         RegCloseKey(classKey);
+        if (l)
+        {
+            SetLastError(ERROR_KEY_DOES_NOT_EXIST);
+            return INVALID_HANDLE_VALUE;
+        }
     }
     return key;
 }

dlls/setupapi/tests/devinst.c

@@ -974,7 +974,6 @@ static void testDevRegKey(void)
         key = pSetupDiOpenDevRegKey(set, &devInfo, DICS_FLAG_GLOBAL, 0,
          DIREG_DRV, 0);
         /* The software key isn't created by default */
-        todo_wine
         ok(key == INVALID_HANDLE_VALUE &&
          GetLastError() == ERROR_KEY_DOES_NOT_EXIST,
          "Expected ERROR_KEY_DOES_NOT_EXIST, got %08x\n", GetLastError());