Snippets for mupdf 1.27.2 from Nix aarch64-linux

Sourced from https://hydra.nixos.org/log/9gxj31j7l88cj4qrri3s42lq8ggagz4m-mupdf-1.27.2.drv.

• source/fitz/deskew_neon.h:99:61: warning: 'q_pair_sum' may be used uninitialized [-Wmaybe-uninitialized]
     99 |                         q_pair_sum = vcombine_s32(pair_sum, vget_high_s32(q_pair_sum));
        |                                                             ^~~~~~~~~~~~~~~~~~~~~~~~~
  

• source/fitz/deskew_neon.h:112:61: warning: 'q_pair_sum' may be used uninitialized [-Wmaybe-uninitialized]
    112 |                         q_pair_sum = vcombine_s32(pair_sum, vget_high_s32(q_pair_sum));
        |                                                             ^~~~~~~~~~~~~~~~~~~~~~~~~
  

• source/fitz/output.c:212:31: warning: ignoring return value of 'ftruncate' declared with attribute 'warn_unused_result' [-Wunused-result]
    212 |                         (void)ftruncate(fileno(file), pos);
        |                               ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
  

• thirdparty/extract/src/join.c:83:55: warning: 'ctm0.d' may be used uninitialized [-Wmaybe-uninitialized]
     83 |                 dot  = ctm_a->c * ctm_b->c + ctm_a->d * ctm_b->d;
        |                                              ~~~~~~~~~^~~~~~~~~~
  

• thirdparty/extract/src/join.c:88:55: warning: 'ctm0.b' may be used uninitialized [-Wmaybe-uninitialized]
     88 |                 dot  = ctm_a->a * ctm_b->a + ctm_a->b * ctm_b->b;
        |                                              ~~~~~~~~~^~~~~~~~~~
  

• thirdparty/extract/src/join.c:84:55: warning: 'ctm0.c' may be used uninitialized [-Wmaybe-uninitialized]
     84 |                 pdot = ctm_a->c * ctm_b->d - ctm_a->d * ctm_b->c;
        |                                              ~~~~~~~~~^~~~~~~~~~
  

• thirdparty/extract/src/join.c:89:55: warning: 'ctm0.a' may be used uninitialized [-Wmaybe-uninitialized]
     89 |                 pdot = ctm_a->a * ctm_b->b - ctm_a->b * ctm_b->a;
        |                                              ~~~~~~~~~^~~~~~~~~~
  

• thirdparty/extract/src/join.c:889:46: warning: 'wmode0' may be used uninitialized [-Wmaybe-uninitialized]
    889 |                                 if (ctm0_set && (wmode != wmode0 || !matrices_are_compatible(&ctm, &ctm0, wmode0)))
        |                                     ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~