update geant4.sh.  Put vars only where needed.  Some formatting.
update geant4.sh.  Put vars only where needed.  Some formatting.

git-svn-id: 06aac1f7aa6783202dd435920b98a457d633d0b0@1323 a9e16012-fd73-49ee-95cb-036de7809213

Tech-XCorp/bilder