tdf#146619 Run IWYU again on include/sot/

Change-Id: I10ac9a7bcd0727a549943227a454475148f36b97
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/193913
Reviewed-by: Gabor Kelemen <gabor.kelemen@collabora.com>
Tested-by: Jenkins

include/sot/object.hxx

@@ -23,7 +23,6 @@
 #include <sal/config.h>
 
 #include <cppuhelper/weak.hxx>
-#include <rtl/ref.hxx>
 #include <sot/sotdllapi.h>
 
 class SOT_DLLPUBLIC SotObject : public cppu::OWeakObject

include/sot/storage.hxx

@@ -21,6 +21,7 @@
 #define INCLUDED_SOT_STORAGE_HXX
 
 #include <sot/object.hxx>
+#include <rtl/ref.hxx>
 #include <tools/stream.hxx>
 #include <tools/globname.hxx>
 #include <comphelper/errcode.hxx>

sot/source/base/object.cxx

@@ -18,6 +18,7 @@
  */
 
 #include <sot/object.hxx>
+#include <rtl/ref.hxx>
 
 SotObject::SotObject()
     : nOwnerLockCount(0)