Mapster32: artdump command is broken

When using the artdump console command, all tiles end up being dumped into the ART file as a distorted mess.

Here's how it looks when viewed with BAFed:

Bisection indicates this problem was introduced with 4c1d40cc . (lol, this feature barely lasted 5 revisions without being broken, rip)

The problem is as follows:

typedef struct {
    uint8_t num;  // animate number
    int8_t xofs, yofs;
    uint8_t sf;  // anim. speed and flags
    + uint8_t tileflags; // tile-specific flags, such as true non-power-of-2 drawing.
} picanm_t;

In the revision above, the tileflags element was added. Artdump does the following:

    // picanm
    for (uint32_t i = 0; i < numtiles; ++i)
    {
        picanm_t p = picanm[i];

        // undo picanm reorder...
        p.num &= ~192;
        p.num |= p.sf & 192;
        p.sf &= 0x0F;

        Bfwrite(&p, sizeof(picanm_t), 1, f);
    }

i.e. it writes the picanm_t struct to the file, but this format is not expected by editors such as BAFed. Hence the resulting ART file will be unreadable.