[gnome-maps] geoJSONSource: Make exporting to image work

[Jonas Danielsson <jonasdn src gnome org>]

commit fe17a71962844c055ab64665c46cc1c80f254b02
Author: Jonas Danielsson <jonas threetimestwo org>
Date:   Sun Dec 13 21:31:11 2015 +0100

    geoJSONSource: Make exporting to image work

 src/geoJSONSource.js |   12 ++++++------
 1 files changed, 6 insertions(+), 6 deletions(-)
---
diff --git a/src/geoJSONSource.js b/src/geoJSONSource.js
index 820178b..01fd917 100644
--- a/src/geoJSONSource.js
+++ b/src/geoJSONSource.js
@@ -218,12 +218,6 @@ const GeoJSONSource = new Lang.Class({
 
     _renderTile: function(tile) {
         let tileJSON = this._tileIndex.getTile(tile.zoom_level, tile.x, tile.y);
-
-        if (!tileJSON) {
-            tile.emit('render-complete', null, 0, false);
-            return;
-        }
-
         let content = new Clutter.Canvas({ width: TILE_SIZE,
                                            height: TILE_SIZE });
         tile.content = new Clutter.Actor({ width: TILE_SIZE,
@@ -231,11 +225,17 @@ const GeoJSONSource = new Lang.Class({
                                            content: content });
 
         content.connect('draw', (function(canvas, cr) {
+            tile.set_surface(cr.getTarget());
             cr.setOperator(Cairo.Operator.CLEAR);
             cr.paint();
             cr.setOperator(Cairo.Operator.OVER);
             cr.setFillRule(Cairo.FillRule.EVEN_ODD);
 
+            if (!tileJSON) {
+                tile.emit('render-complete', null, 0, false);
+                return;
+            }
+
             tileJSON.features.forEach(function(feature) {
                 if (feature.type === TileFeature.POINT)
                     return;