Snippets for calibre 9.13.0 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/jlv0z9f1wmbia2pdcj4xbjl290rqhb4m-calibre-9.13.0.drv.

• ../../../../../src/calibre/gui2/progress_indicator/CalibreStyle.cpp:507:30: warning: comparison of integer expressions of different signedness: ‘unsigned int’ and ‘int’ [-Wsign-compare]
    507 |                     if (used < menuItem->rect.width()) {
        |                         ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
  

• ../../../../../src/calibre/gui2/progress_indicator/CalibreStyle.cpp:504:26: warning: unused variable ‘reverse’ [-Wunused-variable]
    504 |                     bool reverse = menuItem->direction == Qt::RightToLeft;
        |                          ^~~~~~~