Snippets for pixman 0.46.4 from Alpine armhf

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-armhf/main/pixman/pixman-0.46.4-r0.log.

• ../test/pixel-test.c:2977:27: warning: 'mask' may be used uninitialized [-Wmaybe-uninitialized]
   2977 |     if (have_mask && mask != NULL)
        |                           ^
  

• ../pixman/pixman-glyph.c:656:1: warning: 'force_align_arg_pointer' attribute directive ignored [-Wattributes]
    656 | {
        | ^