Get constraint's pointer, set propname and find param spec.
Get constraint's pointer, set propname and find param spec.

midgardproject/midgard-core,piotras/midgard-core,piotras/midgard-core,piotras/midgard-core,midgardproject/midgard-core,piotras/midgard-core,midgardproject/midgard-core,midgardproject/midgard-core