Synfig Gradient Bug 2

SIF file: green-and-blue-gradient.sif

How it renders:

The thin vertical lines shouldn't be there. It should just fade gradually between blue and green and back again.

Here's my proposed patch. With the patch applied, the above sif file renders like this:

However, the bug isn't completely fixed. Here's another SIF file. Before the patch, it rendered like this:

With the patch applied, it renders like this:

If you look closely, there are still some stripes visible which shouldn't be there:

This 2nd patch fixes the remaining problems. With this 2nd patch applied, the above sif file renders like this:

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dooglus > synfig > gradient bugs > linear gradients