Bug#969175: minetest: No text visible with Polish locale

[Maks]

Hello again
First i linked wrong bug at github. Possibly correct one:
https://github.com/minetest/minetest/issues/4152
there are missing characters: aogonek, sacute, nacute

Possible solution:
in file: po/pl/minetest.po
there is special string: needs_fallback_font
Explained here:
https://dev.minetest.net/Translation#Special_character_sequences
In version: 0.4.17.1 and 0.4.15 it was wrongly set. It should be "no"
So affected packages are:
0.4.15+repack2-1 (stretch)
0.4.17.1+repack-1~bpo9+1 (stretch-backports)
0.4.17.1+repack-1+b1 (buster)
I've checked above statement by compiling github's 0.4.17.1 from source 
both needs_fallback_font set to "yes" and "no".

Additional info:
Font DroidSansFallbackFull.ttf from Debian has (almost) no coverage of 
Latin characters. It looks very old.

HTH
Regards
Maks