[FIX] base: print multi record report no outlines

In b446930dc there has been a number of changes in report to improve
performances.

In one of these change, printing several documents with result such as:

```
<div class="article"><h1><span data-oe-model="mymodel" data-oe-id="1" data-oe-field="myfield" /></h1></div>
<div class="article"><h1><span data-oe-model="mymodel" data-oe-id="3" data-oe-field="myfield" /></h1></div>
```

The system will know it is rendering 2 mymodel records (with IDs: 1, 3)
and will try from the document to determines what part (called
"outlines") of the PDF corresponds to these IDs.

This is done by splitting the document over semantical delimitations
such as h1, h2, *.

If all is fine: each part of the PDF will be saved for each record, so
if we print records 1 and 3 they will be saved separately and will be
possibly used as is the next time they are to be printed.

But in the instance of printing a report which has:

- field that are displayed,
- several records printed at the same time,
- save and getting document back from attachment enabled,
- no h1 or other semantic delimitation

The matching of part of PDF and outlines can't be done since there is no
outlines, this was not expected by the code and caused an error.

With this change, if there is no outline each part of the PDF will not
be saved as attachment.

opw-1856469
closes #25496

0 files changed, 0 insertions, 0 deletions