Fix potential NPE.
Merge branch 'OC1.3-MC1.6.4' of github.com:MightyPirates/OpenComputers into OC1.3-MC1.7.2
Merge branch 'OC1.3-MC1.7.2' of github.com:MightyPirates/OpenComputers into OC1.3-MC1.7.10