jojoa1997/display_blocks — pull request #1 by VanessaE (2013-10-05 01:08:03+00:00)
Title: Minor performance tuning change

always check for air before spawning the display block's crystal, and

always check for that crystal before trying to remove it.

keeps display blocks from being potentially destructive, reduces mapgen
activity to just the moment a block is placed instead of multiple
blocks/second.