fix(download): avoid divide by zero when file size is 0

otherwise download failed with error

2026-09-03 09:55:13.8612743-2796WM-WorkerWrappercom.nextcloud.talk2EWork [ id=6044ab54-1b6a-4024-9ed7-09435d65a87e, tags={
com.nextcloud.talk.jobs.DownloadFileToCacheWorker,14053871 } ] failed because it threw an exception/error (Fix with AI)
java.lang.ArithmeticException: divide by zero
at
com.nextcloud.talk.jobs.DownloadFileToCacheWorker.executeDownload(DownloadFileToCacheWorker.kt:117)
at
com.nextcloud.talk.jobs.DownloadFileToCacheWorker.downloadFile(DownloadFileToCacheWorker.kt:88)
at
com.nextcloud.talk.jobs.DownloadFileToCacheWorker.doWork(DownloadFileToCacheWorker.kt:75)
at androidx.work.Worker.startWork$lambda$0(Worker.kt:64)
at androidx.work.Worker$$ExternalSyntheticLambda0.invoke(D8$$SyntheticClass:0)
at androidx.work.WorkerKt.future$lambda$2$lambda$1(Worker.kt:100)
at androidx.work.WorkerKt$$ExternalSyntheticLambda1.run(D8$$SyntheticClass:0)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1100)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
at java.lang.Thread.run(Thread.java:1572)

Signed-off-by: Marcel Hibbe <marcel.hibbe@nextcloud.com>

Author: mahibi

app/src/main/java/com/nextcloud/talk/jobs/DownloadFileToCacheWorker.kt

@@ -112,7 +112,7 @@ class DownloadFileToCacheWorker(val context: Context, workerParameters: WorkerPa
         count = bis.read(data)
 
         while (count != -1) {
-            if (totalFileSize > -1) {
+            if (totalFileSize > 0) {
                 total += count.toLong()
                 val progress = (total * COMPLETE_PERCENTAGE / totalFileSize).toInt()
                 val currentTime = System.currentTimeMillis() - startTime