Bug fix: CSV file should be generated *after* applying the grid

* The CSV file should be generated after calling apply_grid() method
  which updates the grid location of each label.

Signed-off-by: David MENTRE <dmentre@linux-france.org>

ocitysmap2/layoutlib/single_page_renderers.py

@@ -80,10 +80,6 @@ class SinglePageRenderer(Renderer):
             LOG.warning("Designated area leads to an empty index")
             self.street_index = None
 
-        # Dump the CSV street index
-        if self.street_index:
-            self.street_index.write_to_csv(rc.title, '%s.csv' % file_prefix)
-
         self._grid_legend_margin_pt = \
             min(Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_width_pt,
                 Renderer.GRID_LEGEND_MARGIN_RATIO * self.paper_height_pt)
@@ -156,6 +152,10 @@ class SinglePageRenderer(Renderer):
         if self.grid and self.street_index:
             self.street_index.apply_grid(self.grid)
 
+        # Dump the CSV street index
+        if self.street_index:
+            self.street_index.write_to_csv(rc.title, '%s.csv' % file_prefix)
+
         # Commit the internal rendering stack of the map
         self._map_canvas.render()