Fix crash if no servers are defined.

Author: ryanbester

main.spec

@@ -3,13 +3,12 @@
 
 block_cipher = None
 
-
 a = Analysis(
     ['main.py'],
     pathex=[],
     binaries=[],
     datas=[('icon.ico', '.')],
-    hiddenimports=[],
+    hiddenimports=['dependency_injector.errors', 'dependency_injector.wiring', 'six', 'asyncio'],
     hookspath=[],
     hooksconfig={},
     runtime_hooks=[],

views/download.py

@@ -234,10 +234,11 @@ def update_source_dropdown(self):
             self.source_dropdown.destroy()
 
         sources = []
-        if len(self.controller.state.selected_server.dynmap_url) > 0:
-            sources.append('Dynmap')
-        if len(self.controller.state.selected_server.journeymap_url) > 0:
-            sources.append('JourneyMap')
+        if self.controller.state.selected_server is not None:
+            if len(self.controller.state.selected_server.dynmap_url) > 0:
+                sources.append('Dynmap')
+            if len(self.controller.state.selected_server.journeymap_url) > 0:
+                sources.append('JourneyMap')
 
         default = None
         if len(sources) > 0: