[Linux X11] Plugins have Xembed Mapped = 0

[KottV]

Probably this flag should be "1"

vstgui/vstgui/lib/platform/linux/x11utils.h

Line 61 in b883a3e

uint32_t flags{0};

Otherwise all vstgui plugins are broken in recent JUCE hosts: juce-framework/JUCE#1609

[reuk]

I second this. From reading the XEmbed spec, a conformant host should only display an embedded window when its XEMBED_MAPPED flag bit is set, which will currently never be the case for a vstgui plugin.

https://specifications.freedesktop.org/xembed/latest/lifecycle.html