tempblend can't be read back unlike other temp values in m32
Line 597 starts temp clipboard content vars inside `source/duke3d/src/m32vars.cpp`
Possibly when `tempblend` was added, it was never exposed as a RO variable.
A line with `Gv_NewVar("tempblend",(intptr_t)&tempblend, GAMEVAR_INTPTR|GAMEVAR_SYSTEM|GAMEVAR_READONLY);` will remedy this.
issue