[PATCH 4/4] setupapi: Make sure the class name is always set on success in SetupDiGetINFClassW (Valgrind).

[Sven Baars]

Signed-off-by: Sven Baars 
---
 dlls/setupapi/devinst.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/dlls/setupapi/devinst.c b/dlls/setupapi/devinst.c
index f56aee727a..8819d2c4fd 100644
--- a/dlls/setupapi/devinst.c
+++ b/dlls/setupapi/devinst.c
@@ -4188,7 +4188,11 @@ BOOL WINAPI SetupDiGetINFClassW(PCWSTR inf, LPGUID class_guid, PWSTR class_name,
     have_name = 0 < dret;

if (dret >= MAX_PATH -1) FIXME("buffer might be too small\n");
-    if (have_guid && !have_name) FIXME("class name lookup via guid not implemented\n");
+    if (have_guid && !have_name)
+    {
+        class_name[0] = '\0';
+        FIXME("class name lookup via guid not implemented\n");
+    }

if (have_name)
     {