checkasm/vf_blend: rename addition128 and difference128 to grainmerge and grainextract

This was missing from f8d0689d3f. Fixes checkasm.
8 years ago · e51073fe00
--- a/tests/checkasm/vf_blend.c
+++ b/tests/checkasm/vf_blend.c
@@ -103,11 +103,11 @@ void checkasm_check_blend(void)
        check_blend_func();

    check_and_report(addition, BLEND_ADDITION)
    check_and_report(addition128, BLEND_ADDITION128)
    check_and_report(grainmerge, BLEND_GRAINMERGE)
    check_and_report(and, BLEND_AND)
    check_and_report(average, BLEND_AVERAGE)
    check_and_report(darken, BLEND_DARKEN)
    check_and_report(difference128, BLEND_DIFFERENCE128)
    check_and_report(grainextract, BLEND_GRAINEXTRACT)
    check_and_report(hardmix, BLEND_HARDMIX)
    check_and_report(lighten, BLEND_LIGHTEN)
    check_and_report(multiply, BLEND_MULTIPLY)