Lines missing in the export of the row evolution of a download URL

[lato333]

When you try to export the row evolution of a Download URL under "Actions / Downloads", there may be some lines missing.

Reproducible on demo.piwik.org:

• Open http://demo.piwik.org/index.php?module=CoreHome&action=index&idSite=7&period=year&date=2015-10-03#?module=Actions&action=menuGetDownloads&idSite=7&period=year&date=2015-10-03&popover=RowAction$3ARowEvolution$3AActions.getDownloads$3A$257B$257D$3Abuilds.piwik.org$20$3E$20$40$252Fpiwik-1.9.2-b3.zip
• When you export to another format (CSV, XML, ...) the line/statistics for the year 2014 is missing.
• If you select "10" as number of rows to display, then it will appear in the exported report.

[mattab]

Thanks for the report @lato333

• Reproduce URL: http://demo.piwik.org/index.php?module=API&method=Actions.getDownloads&format=XML&idSite=7&period=year&date=2011-01-01,2015-12-31&label=&date=2011-01-01%2C2015-12-31&filter_limit=5&format_metrics=1&expanded=1&label=builds.piwik.org%20%26gt%3B%20%40%252Fpiwik-1.9.2-b3.zip&token_auth=anonymous&filter_limit=5 (note filter_limit=5)
• Got: 2014 has no data with filter_limit=5
• Expected: 2014 row should have data.
  • When filter_limit=10 then 2014 has data: http://demo.piwik.org/index.php?module=API&method=Actions.getDownloads&format=XML&idSite=7&period=year&date=2011-01-01,2015-12-31&label=&date=2011-01-01%2C2015-12-31&filter_limit=5&format_metrics=1&expanded=1&label=builds.piwik.org%20%26gt%3B%20%40%252Fpiwik-1.9.2-b3.zip&token_auth=anonymous&filter_limit=10