Emissive textures of magma blocks are not working

Magma block textures are now not emissive, while normally they should. 

This makes it really hard to find magma blocks in aquifers, and gives magma blocks an unnatural feel. 

Note: This is not about block light. Magma blocks still produce light. 

Steps to Reproduce: 

1. Find a place with no light. 

2. Place a magma block and look at it. 

Expected Results: 

The magma block textures are emissive, that is to say, can be clearly seen in dark areas as if it is glowing. 

Observed Results: 

Magma block textures are not emissive, it is hardly visible.