Fix pdftops -eps -level1sep rendering of a file

Since 8fb243bf11a979af8bfa36427436940706c9f71d we have
        case splashModeXBGR8:
+         cSrcNonIso[3] = 255;
and that means splashModeDeviceN8 and splashModeCMYK8 can't
skip their breaks anymore otherwise the cSrcNonIso[3] gets
overwritten

Bug #68321
1 file changed