I believe the intent was to "retarget unresolved pLogCluster[n] to a glyph inside the cluster".
Unfortunately in the loop that detects clusters there was a typo and we are only indexing
element 0 of the array:

    // retarget unresolved pLogCluster[n] to a glyph inside the cluster
    // TODO: better do it while the deleted-glyph markers are still there
    for( n = 0; n < nCharCount; ++n )
        if( (p = pLogCluster[0]) >= 0 )
            break;

That just doesn't make any sense, I believe we should be accessing pLogCluster[n].
If not, then why not just do:

    p = pLogCluster[0];
    n = nCharCount - 1;

Change-Id: I9d8873541b5c794071d69c0f63df88f17a352904
Reviewed-on: https://gerrit.libreoffice.org/13876Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>