Don't use VST-provided memory when loading chunks

[DomClark]

Fixes #493. May potentially break some other plugins, see this comment on the issue.

[Umcaruje]

I tested this on Linux Qt4, this fixes the crash when loading the VST. I also opened Synth1, and it performed as expected.

The plugin has another quirk on linux, it's GUI disappears when interacted with, but this was not introduced with this PR, so I believe it would deem an issue of it's own. (I'd like to test with qt5 first before making one though)

[musikBear]

The plugin has another quirk on linux

@Umcaruje Looks a lot like a re-draw issue, so the behaviour could be different with different graphic hw.
I see this in other GUIs, but there it appears as black blocks. They are fixed on my hw, by pushing the UI slowly into the edge of the screen, and bringing it back.

[tresf]

@musikBear there may also be Wine logs that have some errors. P.S. Stop using Windows XP.

[zonkmachine]

P.S. Stop using Windows XP.

@musikBear I think what @tresf is refering to here, more specifically, is a later OS (Windows Vista not included).

[musikBear]

💸 is actually the issue.. Not laziness or incompetence 💸