Bug#1099176: gnucash: QIF import fails

[Chris Bainbridge]

This really needs to be fixed as it makes QIF import useless.

The upstream patch is 6531d3e46b7bee1add61aa6c6aaf8fb1f889a586
https://github.com/Gnucash/gnucash/commit/6531d3e46b7bee1add61aa6c6aaf8fb1f889a586

The patch is included in gnucash-5.11