[locale] Adjust latitude calculation in the southern hemisphere

The scaling on the map was a little off; the degrees of latitude
are a little wider there than around the equator and Europe.

 - Johannesburg is in the right spot
 - Hobart is no longer a suburb of Melbourne
 - Punta Arenas is in Chile

src/modules/locale/timezonewidget/timezonewidget.cpp

@@ -138,6 +138,10 @@ QPoint TimeZoneWidget::getLocationPosition( double longitude, double latitude )
     // country, and Inuvik isn't in the ocean.
     if ( latitude > 62.0 )
         y -= sin( MATH_PI * ( latitude - 62.0 ) / 56.0 ) * MAP_Y_OFFSET * height;
+    // Far south, some stretching occurs as well, but it is less pronounced.
+    // Move down by 1 pixel per 5 degrees past 10 south
+    if ( latitude < - 14 )
+        y += int( (-latitude) / 5.0 );
     // Antarctica isn't shown on the map, but you could try clicking there
     if ( latitude < -60 )
         y = height - 1;