[gnome-maps/gnome-3-36] mapView: Don't try to set aerial tiles if not available

[Marcus Lundblad <mlundblad src gnome org>]

commit bcd2012cd26d369f7bf85a3caa674235c74f54b0
Author: Marcus Lundblad <ml update uu se>
Date:   Thu May 27 23:12:34 2021 +0200

    mapView: Don't try to set aerial tiles if not available
    
    Safe-guard agains setting the aerial tile source
    if it's not available in the service file.
    This avoid a crash if aerial was saved as last-used
    map type in gsettings and at next startup the service
    has dropped support.

 src/mapView.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/mapView.js b/src/mapView.js
index 3c27cdf7..b034c241 100644
--- a/src/mapView.js
+++ b/src/mapView.js
@@ -322,7 +322,7 @@ var MapView = GObject.registerClass({
         this._mapType = mapType;
 
         if (mapType !== MapType.LOCAL) {
-            if (mapType === MapType.AERIAL)
+            if (mapType === MapType.AERIAL && Service.getService().tiles.aerial)
                 this.view.map_source = MapSource.createAerialSource();
             else
                 this.view.map_source = MapSource.createStreetSource();