Check if argument of SET instructions is valid

[jannic]

In response to https://matrix.to/#/!YoLPkieCYHGzdjUhOK:matrix.org/$3RzuJ-nmtaz_z1qPf3CiSzEfYGdSZ8F7Ru4skRZ_eN0?via=matrix.org&via=tchncs.de&via=mozilla.org where the poster was surprised that this doesn't work as expected:

        let prg = pio_proc::pio_asm!(
            "set x, 0x333",
            "mov isr, x",
            "mov rxfifo[0], isr",
        );

[jannic]

CI errors are already fixed in #61

[9names]

looks fine, just 1 nitpick comment

[9names]

seems strange to call data.reify(state) when you've got the binding arg that you've used for the last few lines.

[jannic]

Of course! I didn't mean to repeat the call to reify, this was a plain oversight.