Resolves: #i119844# Spin effect amount property lost when saving pptx to odp

(cherry picked from commit a7eedd28)

Change-Id: Ia2b46f4b35fc90723570b7f8bfb82c101279eb9d

oox/source/ppt/timenodelistcontext.cxx

@@ -718,7 +718,7 @@ namespace oox { namespace ppt {
                 if(attribs.hasAttribute( XML_by ) )
                 {
                     sal_Int32 nBy = attribs.getInteger( XML_by, 0 );
-                    pNode->setBy( makeAny( nBy ) );
+                    pNode->setBy( makeAny( (double)nBy ) );
                 }
                 if(attribs.hasAttribute( XML_from ) )
                 {