Prevent tapping on thumbnail if video details are not loaded

app/src/main/java/org/schabi/newpipe/fragments/detail/VideoDetailFragment.java

@@ -505,12 +505,18 @@ public final class VideoDetailFragment
                 }
                 break;
             case R.id.detail_thumbnail_root_layout:
+                // make sure not to open any player if there is nothing currently loaded!
+                // FIXME removing this `if` causes the player service to start correctly, then stop,
+                //  then restart badly without calling `startForeground()`, causing a crash when
+                //  later closing the detail fragment
+                if (currentInfo != null) {
                     autoPlayEnabled = true; // forcefully start playing
                     // FIXME Workaround #7427
                     if (isPlayerAvailable()) {
                         player.setRecovery();
                     }
                     openVideoPlayerAutoFullscreen();
+                }
                 break;
             case R.id.detail_title_root_layout:
                 toggleTitleAndSecondaryControls();