Diffusion Krita f9be64b30dc9

Fix converting multile shapes into a vector selection

Authored by dkazakov on Jun 3 2020, 8:31 PM.

Description

Fix converting multile shapes into a vector selection

The code was written in expectation that there will be only one shape
on a shape selection, which is not entirely true (as we found out in
the bug 414262)

BUG:414262