c_GDPpcScen flag crashes code

Created by: giannou

fixed temporarily with #8 but the problem has to be solved for the long run

Created by: LaviniaBaumstark

fixed

@giannou in case this is still relevant:

= is not an assignment operator, but test numerical equality.

$if %cm_GDPScen% == "gdpSSP1" $setglobal c_GDPpcScen "SSP1"

should work.

Designs