Remove period from clearGpx comment

Author: Pygmalion69

app/src/main/java/org/nitri/opentopo/MapFragment.kt

@@ -1014,7 +1014,7 @@ class MapFragment : Fragment(), LocationListener, PopupMenu.OnMenuItemClickListe
         fun getGpx(): Gpx?
 
         /**
-         * Clear GOX so it won't ne restored on config change
+         * Clear GPX so it won't be restored on config change
          */
         fun clearGpx()