[lfs] Only check XDG_CONFIG_HOME when not on 'Windows'

When running legendary through Wine and `XDG_CONFIG_HOME` is set in the environment,
`config_path` resolves to the absolute path to the Linux config directory. Wine in turn
resolves the path in the way that Legendary uses the existing Linux host config
directory instead of creating/using the one under Wine prefix in `%USERPROFILE%\.config`

Author: loathingKernel

legendary/lfs/lgndry.py

@@ -26,6 +26,10 @@ class LGDLFS:
     def __init__(self, config_file=None):
         self.log = logging.getLogger('LGDLFS')
 
+        # This can happen only when running in Wine under an OS using freedesktop
+        if os.name == 'nt' and os.environ.get('XDG_CONFIG_HOME', None):
+            del os.environ['XDG_CONFIG_HOME']
+
         if config_path := os.environ.get('LEGENDARY_CONFIG_PATH'):
             self.path = config_path
         elif config_path := os.environ.get('XDG_CONFIG_HOME'):