[PATCH 3/7] setupapi: Treat DIGCF_ALLCLASSES as if a NULL device class was given.

[Zebediah Figura]

Signed-off-by: Zebediah Figura 
---
 dlls/setupapi/devinst.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/dlls/setupapi/devinst.c b/dlls/setupapi/devinst.c
index 877286e2aae..2f490f0978f 100644
--- a/dlls/setupapi/devinst.c
+++ b/dlls/setupapi/devinst.c
@@ -2448,6 +2448,9 @@ HDEVINFO WINAPI SetupDiGetClassDevsExW(const GUID *class, PCWSTR enumstr, HWND p
         SetLastError(ERROR_INVALID_PARAMETER);
         return INVALID_HANDLE_VALUE;
     }
+    if (flags & DIGCF_ALLCLASSES)
+        class = NULL;
+
     if (flags & unsupportedFlags)
         WARN("unsupported flags %08x\n", flags & unsupportedFlags);
     if (deviceset)