Snippets for httrack 3.49.21 from Alpine riscv64

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-riscv64/testing/httrack/httrack-3.49.21-r0.log.

• minizip/zip.c:1931:15: warning: cast increases required alignment of target type [-Wcast-align]
   1931 |     header = *(short*)p;
        |               ^
  

• minizip/zip.c:1932:19: warning: cast increases required alignment of target type [-Wcast-align]
   1932 |     dataSize = *(((short*)p)+1);
        |                   ^
  

• htsselftest.c:4884:16: warning: unused variable 'tlen' [-Wunused-variable]
   4884 |   const size_t tlen = sizeof(cc_text) - 1;
        |                ^~~~