don't complain if ruby can't be found
don't complain if ruby can't be found

--HG--
extra : convert_revision : 4f81627b2b28e9cc43e867096e7861091a361c46

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