Image generation broken on my setup

[mihaild]

After manual fixing problems in GH-55, I get an error when trying to generate image:
`GIMP-Error: Calling error for procedure 'gimp-text-layer-set-text':
Layer 'Raider 1' (434) cannot be used because it is not a text layer

batch command experienced an execution error:
Error: ( : 34) Procedure execution of gimp-text-layer-set-text failed on invalid input arguments: Layer 'Raider 1' (434) cannot be used because it is not a text layer

(gimp:32169): Gimp-Base-WARNING **: tile ref count balance: 4`

If I understood correctly, it happens when processing ling
"Sector",1,0,4,0,0,0,,,,,,

It happens with current version of .xcf file, and with version from e5568d2. 0240517 version works correctly.

Gimp version 2.8.18.