通知処理済みフラグの削除処理が終わらないバグを修正

app/build.gradle

@@ -130,7 +130,7 @@ android {
                 def branch = providers.exec {
                     commandLine("git", "rev-parse", "--abbrev-ref", "HEAD")
                 }.standardOutput.asText.get()?.trim() ?: "(no branch)"
-                
+
                 outputFileName = "SubwayTooter-${branch}-${flavor}-${versionCode}-${versionName}-${date}.apk"
             }
         }

app/src/main/java/jp/juggler/subwaytooter/table/NotificationShown.kt

@@ -75,10 +75,11 @@ class NotificationShown(
                     log.i("$acct size=$size")
                     // 掃除する頻度を下げるため、ここのしきい値は倍にする
                     if (size <= keep * 2) continue
-                    while (true) {
+                    var deleteCount = 0
+                    while (deleteCount++ < 3) {
                         // 一度に削除したい数
                         val step = min(100, size - keep)
-                        if (step <= 0) continue
+                        if (step <= 0) break
                         // 古いものからstep件目の時刻を読む
                         val time = db.rawQuery(
                             "select $COL_TIME_CREATE from $table where $COL_ACCT=? order by $COL_TIME_CREATE asc limit ?",