MemoryByteGrabber sequence has to exist for Grabber lifetime

it just takes a c++ ref, so a temp is an unsuitable arg

Change-Id: I40490e94d977df91b985bc4ae458b68ee85d5dfe
Reviewed-on: https://gerrit.libreoffice.org/49321Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Caolán McNamara <caolanm@redhat.com>
Tested-by: Caolán McNamara <caolanm@redhat.com>

package/source/zipapi/ZipFile.cxx

@@ -902,7 +902,7 @@ sal_Int32 ZipFile::readCEN()
         if ( static_cast < sal_Int64 > ( nCenLen ) != nRead )
             throw ZipException ("Error reading CEN into memory buffer!" );
 
-        MemoryByteGrabber aMemGrabber ( aCENBuffer );
+        MemoryByteGrabber aMemGrabber(aCENBuffer);
 
         ZipEntry aEntry;
         sal_Int16 nCommentLen;
@@ -1015,7 +1015,8 @@ void ZipFile::recover()
                 if ( nPos < nBufSize - 30 && pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 3 && pBuffer[nPos+3] == 4 )
                 {
                     ZipEntry aEntry;
-                    MemoryByteGrabber aMemGrabber ( Sequence< sal_Int8 >( &(pBuffer[nPos+4]), 26 ) );
+                    Sequence<sal_Int8> aTmpBuffer(&(pBuffer[nPos+4]), 26);
+                    MemoryByteGrabber aMemGrabber(aTmpBuffer);
 
                     aEntry.nVersion = aMemGrabber.ReadInt16();
                     if ( ( aEntry.nVersion & 1 ) != 1 )
@@ -1084,7 +1085,8 @@ void ZipFile::recover()
                 else if (pBuffer[nPos] == 'P' && pBuffer[nPos+1] == 'K' && pBuffer[nPos+2] == 7 && pBuffer[nPos+3] == 8 )
                 {
                     sal_Int64 nCompressedSize, nSize;
-                    MemoryByteGrabber aMemGrabber ( Sequence< sal_Int8 >( &(pBuffer[nPos+4]), 12 ) );
+                    Sequence<sal_Int8> aTmpBuffer(&(pBuffer[nPos+4]), 12);
+                    MemoryByteGrabber aMemGrabber(aTmpBuffer);
                     sal_Int32 nCRC32 = aMemGrabber.ReadInt32();
                     sal_uInt32 nCompressedSize32 = aMemGrabber.ReadUInt32();
                     sal_uInt32 nSize32 = aMemGrabber.ReadUInt32();