[SHELLFOLDERS] Gracefully handle NULL pidl in CDrivesFolder::BindToObject. CORE-16403

Fixes one of many crashes in shell32_winetest:shlfolder.

Author: ThFabba

dll/win32/shell32/folders/CDrivesFolder.cpp

@@ -536,6 +536,9 @@ HRESULT WINAPI CDrivesFolder::BindToObject(PCUIDLIST_RELATIVE pidl, LPBC pbcRese
     TRACE("(%p)->(pidl=%p,%p,%s,%p)\n", this,
           pidl, pbcReserved, shdebugstr_guid(&riid), ppvOut);
 
+    if (!pidl)
+        return E_INVALIDARG;
+
     if (_ILIsSpecialFolder(pidl))
         return m_regFolder->BindToObject(pidl, pbcReserved, riid, ppvOut);