Snippets for vips 8.18.6 from Alpine armv7

Sourced from https://build.alpinelinux.org/buildlogs/build-edge-armv7/community/vips/vips-8.18.6-r0.log.

• ../libvips/include/vips/util.h:68:31: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
     68 | #define VIPS_ALIGNED(P, N) ((((guint64) (P)) & ((N) - 1)) == 0)
        |                               ^