loplugin:useuniqueptr in ScMultipleReadHeader

Change-Id: I517593a910ed5783f256722bad915be2232f290e
Reviewed-on: https://gerrit.libreoffice.org/51913Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

sc/inc/rechead.hxx

@@ -53,7 +53,8 @@ private:
     SvStream&           rStream;
     std::unique_ptr<sal_uInt8[]>
                         pBuf;
-    SvMemoryStream*     pMemStream;
+    std::unique_ptr<SvMemoryStream>
+                        pMemStream;
     sal_uLong           nEndPos;
     sal_uLong           nEntryEnd;
     sal_uLong           nTotalEnd;

sc/source/core/tool/rechead.cxx

@@ -41,7 +41,7 @@ ScMultipleReadHeader::ScMultipleReadHeader(SvStream& rNewStream) :
             rStream.SetError( SVSTREAM_FILEFORMAT_ERROR );
 
         //  everything to 0, so  BytesLeft() aborts at least
-        pBuf = nullptr; pMemStream = nullptr;
+        pBuf = nullptr; pMemStream.reset();
         nEntryEnd = nDataPos;
     }
     else
@@ -50,7 +50,7 @@ ScMultipleReadHeader::ScMultipleReadHeader(SvStream& rNewStream) :
         rStream.ReadUInt32( nSizeTableLen );
         pBuf.reset( new sal_uInt8[nSizeTableLen] );
         rStream.ReadBytes( pBuf.get(), nSizeTableLen );
-        pMemStream = new SvMemoryStream( pBuf.get(), nSizeTableLen, StreamMode::READ );
+        pMemStream.reset(new SvMemoryStream( pBuf.get(), nSizeTableLen, StreamMode::READ ));
     }
 
     nEndPos = rStream.Tell();
@@ -65,7 +65,7 @@ ScMultipleReadHeader::~ScMultipleReadHeader()
         if ( rStream.GetError() == ERRCODE_NONE )
             rStream.SetError( SCWARN_IMPORT_INFOLOST );
     }
-    delete pMemStream;
+    pMemStream.reset();
 
     rStream.Seek(nEndPos);
 }