I'm about to commit a fix for this cloned bug. However, please note:

Fixing this bug in x2goserver is not sufficient to make Cinnamon & 2.0 & 2.2 to work properly with X2Go. Bug #150 in nx-libs is still a problem. Fixing this bug will enable Cinnamon 2.0 and 2.2 to launch to their "fallback mode", which has many bugs and missing features when compared to "software rendering" mode (cinnamon2d), but is still better than nothing.