Merge pull request #206 from chennes/ensureModDirExists

Ensure the Mod dir exists when needed

Author: chennes

addonmanager_installation_manifest.py

@@ -80,6 +80,8 @@ def __init__(self, catalog: AddonCatalog = None):
             self._scan_mod_path_for_extras(catalog)
 
     def _migrate_to_manifest_file(self, catalog: AddonCatalog):
+        if not os.path.exists(fci.DataPaths().mod_dir):
+            os.makedirs(fci.DataPaths().mod_dir)
         dirs_in_mod = os.listdir(fci.DataPaths().mod_dir)
         for addon_id in dirs_in_mod:
             branches = []