Single (not stacked) wired glass tile vanishing instead of turning into light tile.

[Ms.Degrasse]

Bug Description:
Stacked wired glass tiles properly turn into light tiles. But a single one just disappear.

Steps to reproduce:
1. Apply a cable coil to glass sheets. Those will turn into wired glass tiles.
2. Stack them, and by applying a metal sheet, they turn into light tiles - minus the last one.
3. Yes... You got it...
Actually applying a metal sheet to a single wired glass tile deletes it instead ot turning it into a light tile.
But doing this to a stack of at least two wired glass tiles work properly.

[MadSnailDisease]

Fixed.