#707 backend_shinkos1245.c:500:27: warning: '<<' in boolean context, did you mean '<' ? [-Wint-in-bool-context]

[dcb]

Source code is

   cmd.cmd[0] = 0x0a || (i << 4);

Maybe better code

   cmd.cmd[0] = 0x0a | (i << 4);

[Solomon Peachy]

This was fixed on 2017-01-12, and I thought it made it into the 5.2.12 tarball. If not, then it's definitely in the just-released 5.2.13-pre1 tarball.

FWIW, the S1245 driver is considered highly experimental as I don't have access to one of these printers to actually test this stuff on.