Description:
build() function in PKGBUILD of libmatchbox 1.9 used patch to replace it with old function png_check_sig with new one png_sig_cmp, but due to change return value meaning in the new function replacement should be following:

sed -i 's|png_check_sig( header, 8 )|png_sig_cmp( header, 0, 8 ) == 0|' libmb/mbpixbuf.c

instead of

sed -i 's|png_check_sig( header, 8 )|png_sig_cmp( header, 0, 8 )|' libmb/mbpixbuf.c

cause png_sig_cmp returning now zero same as memcmp does, in case of equivalence.

Because of to this bug matchbox cannot now to load any png file from themes.

Additional info:
* package version(s)
libmatchbox 1.9