rig_dict 'external' Keyerror fix

Author: eigen-value

__init__.py

@@ -126,7 +126,7 @@ def update_external_rigs(self, context):
 
         custom_rigs_folder = bpy.context.user_preferences.addons['rigify'].preferences.custom_rigs_folder
 
-        if custom_rigs_folder == "":
+        if custom_rigs_folder == "" and 'external' in rig_lists.rigs_dict:
             rig_lists.rigs_dict.pop('external')
             return
 

ui.py

@@ -631,7 +631,7 @@ def draw(self, context):
         # Rig type parameters / Rig type non-exist alert
         if rig_name != "":
             try:
-                if rig_name in rig_lists.rigs_dict['external']['rig_list']:
+                if 'external' in rig_lists.rigs_dict and rig_name in rig_lists.rigs_dict['external']['rig_list']:
                     custom_rigs_folder = bpy.context.user_preferences.addons['rigify'].preferences.custom_rigs_folder
                     rig = get_rig_type(rig_name, custom_rigs_folder)
                 else: