Don't try to print Reaction Library name in case there isn't one.
Don't try to print Reaction Library name in case there isn't one.

Without this fix, running without a reactino Library causes a null
pointer exception.

Signed-off-by: Richard West <9bd490a4f453b93cf9fd9834a38e01d2badc8a91@mit.edu>
faribas/RMG-Java,rwest/RMG-Java,enochd/RMG-Java,KEHANG/RMG-Java,enochd/RMG-Java,ReactionMechanismGenerator/RMG-Java,connie/RMG-Java,nyee/RMG-Java,nyee/RMG-Java,nyee/RMG-Java,enochd/RMG-Java,faribas/RMG-Java,KEHANG/RMG-Java,jwallen/RMG-Java,ReactionMechanismGenerator/RMG-Java,enochd/RMG-Java,KEHANG/RMG-Java,ReactionMechanismGenerator/RMG-Java,faribas/RMG-Java,ReactionMechanismGenerator/RMG-Java,connie/RMG-Java,keceli/RMG-Java,rwest/RMG-Java,faribas/RMG-Java,jwallen/RMG-Java,jwallen/RMG-Java,connie/RMG-Java,ReactionMechanismGenerator/RMG-Java,enochd/RMG-Java,keceli/RMG-Java,KEHANG/RMG-Java,jwallen/RMG-Java,rwest/RMG-Java,jwallen/RMG-Java,keceli/RMG-Java,connie/RMG-Java,keceli/RMG-Java,enochd/RMG-Java,connie/RMG-Java,rwest/RMG-Java,nyee/RMG-Java,KEHANG/RMG-Java,jwallen/RMG-Java,keceli/RMG-Java,nyee/RMG-Java,keceli/RMG-Java,KEHANG/RMG-Java,nyee/RMG-Java,rwest/RMG-Java