The unconditional tileCacheRemove() on a bad JPEG header only covers the
generic cache path, which the microSD branch never reaches in the mode
this PR is about: with SD tiles on and OSM selected, /tiles/<z>/<x>/<y>.jpg
is read by the SD branch, returned as-is, and then fails in
decodeJpegScaledToRgb565(). That path only does ++n_missing, so unlike a
load miss it does not queue a re-fetch either -- a half-written tile sat
there until a manual "Reload visible tiles".
Apply the same 3-byte SOI check to that leg only. /maps/osm packs and PNG
packs dropped into /tiles keep their read-only contract: they cannot be
re-downloaded, so they are never removed.
Signed-off-by: Pixel Perfect <me@pixp.cc>
Pixel Perfect
e53f6586da