no need to allocate these on the heap

Change-Id: I46de98204ec705bd2f6a618cb0cfae5149cea84e
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/116475
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sot/source/sdstor/stgio.cxx

@@ -27,6 +27,7 @@
 #include <sal/log.hxx>
 
 #include <memory>
+#include <optional>
 
 ///////////////////////////// class StgIo
 
@@ -363,7 +364,7 @@ FatError StgIo::ValidateFATs()
 {
     if( m_bFile )
     {
-        std::unique_ptr<Validator> pV(new Validator( *this ));
+        std::optional<Validator> pV( *this );
         bool bRet1 = !pV->IsError(), bRet2 = true ;
         pV.reset();
 
@@ -376,7 +377,7 @@ FatError StgIo::ValidateFATs()
                       StreamMode::READ | StreamMode::SHARE_DENYNONE) &&
             aIo.Load() )
         {
-            pV.reset(new Validator( aIo ));
+            pV.emplace( aIo );
             bRet2 = !pV->IsError();
             pV.reset();
         }

sot/source/sdstor/ucbstorage.cxx

@@ -42,6 +42,7 @@
 #include <com/sun/star/ucb/ContentCreationException.hpp>
 
 #include <memory>
+#include <optional>
 #include <osl/diagnose.h>
 #include <osl/file.hxx>
 #include <sal/log.hxx>
@@ -2120,7 +2121,7 @@ sal_Int16 UCBStorage_Impl::Commit()
                         {
                             // create a stream to write the manifest file - use a temp file
                             OUString aURL( aNewSubFolder.getURL() );
-                            std::unique_ptr< ::utl::TempFile> pTempFile(new ::utl::TempFile( &aURL ));
+                            std::optional< ::utl::TempFile> pTempFile(&aURL );
 
                             // get the stream from the temp file and create an output stream wrapper
                             SvStream* pStream = pTempFile->GetStream( StreamMode::STD_READWRITE );