fix: skip other casings in a foreign tree

reminiscence's Flashback module reunion resolved to skyline's
zoneinfo/Indian/Reunion through the case-insensitive name step, and the
emulator pack shipped the time-zone file. Another casing found only in
another emulator's tree says nothing about the entry.

scripts/common.py

@@ -1564,11 +1564,16 @@ def resolve_local_file(
             # runs when no casing matches exactly, or when only another
             # emulator's tree does: xm6typeg got XM6 Utility's synthesized
             # SCSIINROM.DAT while the X68000 dump sat as scsiinrom.dat.
+            # Another casing in another emulator's tree proves nothing:
+            # reminiscence's music module reunion took skyline's
+            # zoneinfo/Indian/Reunion.
             folded = _casefold_name_index(by_name)
             for try_name in names_to_try:
                 for match_sha1 in folded.get(try_name.casefold(), []):
                     if match_sha1 in files_db and _size_ok(match_sha1):
                         path = files_db[match_sha1]["path"]
+                        if _foreign_tree(path, owners):
+                            continue
                         if os.path.exists(path) and path not in candidates:
                             candidates.append(path)
         if candidates:

tests/test_foreign_tree_names.py

@@ -93,6 +93,16 @@ class ForeignTreeNames(unittest.TestCase):
         self.assertEqual(status, "data_dir")
         self.assertEqual(Path(path).read_bytes(), b"B" * 64)
 
+    def test_another_casing_in_another_tree_is_not_the_file(self):
+        """reminiscence's music module reunion took skyline's
+        zoneinfo/Indian/Reunion, a time-zone file, on the casefold step."""
+        self._hold("bios/Other/skyline/tzdata/zoneinfo/Indian/Reunion", b"T" * 64)
+        entry = {
+            "name": "reunion", "aliases": ["mod.flashback-reunion"],
+            "category": "game_data", "source_profile": "reminiscence",
+        }
+        self.assertEqual(resolve_local_file(entry, self.db), (None, "not_found"))
+
 
 if __name__ == "__main__":
     unittest.main()