minetest/common — pull request #41 by kaeza (2013-04-30 02:43:19+00:00)
Title: Removed inventory_image from default:glass

This solves this glitch (which seems really ugly):

https://dl.dropboxusercontent.com/u/100008207/screenshot_1489357526.jpg

Right one is current glass when dropped.
Left one is what this fix does.