small fixes for generating python bindings
small fixes for generating python bindings

--HG--
extra : convert_revision : 7b41e27cd264fd3af6aa7b545074f3768eb141a7

utiasASRL/batch-informed-trees,utiasASRL/batch-informed-trees,sonny-tarbouriech/ompl,utiasASRL/batch-informed-trees,davetcoleman/ompl,davetcoleman/ompl,davetcoleman/ompl,utiasASRL/batch-informed-trees,jvgomez/ompl,florianhauer/ompl,florianhauer/ompl,florianhauer/ompl,jvgomez/ompl,jvgomez/ompl,jvgomez/ompl,sonny-tarbouriech/ompl,florianhauer/ompl,florianhauer/ompl,davetcoleman/ompl,jvgomez/ompl,jvgomez/ompl,utiasASRL/batch-informed-trees,utiasASRL/batch-informed-trees,sonny-tarbouriech/ompl,sonny-tarbouriech/ompl,sonny-tarbouriech/ompl,sonny-tarbouriech/ompl,davetcoleman/ompl,davetcoleman/ompl,florianhauer/ompl