Show "N/A" if there is no scrape

Disambiguates whether the tracker send a response of 0 peers/seeds/downloaded or didn't send one at all.

src/gui/properties/trackerlistwidget.cpp

@@ -367,13 +367,13 @@ void TrackerListWidget::loadTrackers()
 
         item->setText(COL_RECEIVED, QString::number(data.numPeers));
 #if LIBTORRENT_VERSION_NUM >= 10000
-        item->setText(COL_SEEDS, QString::number(entry.nativeEntry().scrape_complete > 0 ? entry.nativeEntry().scrape_complete : 0));
-        item->setText(COL_PEERS, QString::number(entry.nativeEntry().scrape_incomplete > 0 ? entry.nativeEntry().scrape_incomplete : 0));
-        item->setText(COL_DOWNLOADED, QString::number(entry.nativeEntry().scrape_downloaded > 0 ? entry.nativeEntry().scrape_downloaded : 0));
+        item->setText(COL_SEEDS, (entry.nativeEntry().scrape_complete > -1) ? QString::number(entry.nativeEntry().scrape_complete) : tr("N/A"));
+        item->setText(COL_PEERS, (entry.nativeEntry().scrape_incomplete > -1) ? QString::number(entry.nativeEntry().scrape_incomplete) : tr("N/A"));
+        item->setText(COL_DOWNLOADED, (entry.nativeEntry().scrape_downloaded > -1) ? QString::number(entry.nativeEntry().scrape_downloaded) : tr("N/A"));
 #else
-        item->setText(COL_SEEDS, '0');
-        item->setText(COL_PEERS, '0');
-        item->setText(COL_DOWNLOADED, '0');
+        item->setText(COL_SEEDS, tr("N/A"));
+        item->setText(COL_PEERS, tr("N/A"));
+        item->setText(COL_DOWNLOADED, tr("N/A"));
 #endif
 
         item->setTextAlignment(COL_TIER, (Qt::AlignRight | Qt::AlignVCenter));