fix: preserve complete Japanese readings

tests/trie_test.c

@@ -76,10 +76,14 @@ transmap_states(struct ct *t)
 	};
 	Emit e;
 	Im state;
+	Trie *fixture, *saved;
 	int i;
 
+	fixture = trieopen("data/hira.map");
 	memset(&state, 0, sizeof state);
 	state.l = getlang(LangJP);
+	saved = state.l->map;
+	state.l->map = fixture;
 	for(i = 0; i < nelem(cases); i++){
 		state.pre = mkstr(cases[i].pre);
 		e = transmap(&state, cases[i].key);
@@ -90,4 +94,6 @@ transmap_states(struct ct *t)
 		checkstr(t, "next", cases[i].next, &e.next);
 		checkstr(t, "mapped", cases[i].mapped, &e.dict);
 	}
+	trieclose(fixture);
+	state.l->map = saved;
 }