New comment by ericonr on void-packages repository

https://github.com/void-linux/void-packages/pull/28390#issuecomment-772228358

Comment:
```
diff --git a/srcpkgs/kdenlive/template b/srcpkgs/kdenlive/template
index 8595ca6d44..1dbc21964d 100644
--- a/srcpkgs/kdenlive/template
+++ b/srcpkgs/kdenlive/template
@@ -21,3 +21,7 @@ checksum=9b6e22ad311c33457e7f7147ad873286945fc6c3b610129856fd01cbb51da458
 
 # needed for mlt to work on musl
 CXXFLAGS="-DHAVE_LOCALE_H=1"
+
+pre_check() {
+	export QT_QPA_PLATFORM=offscreen
+}
```

For that part, but there are still other failing tests.

@jnbr