windows: default version to '0' when looking for Ghostscript

To avoid ValueError: max() arg is an empty sequence As suggested by @meet1919 in #833.
2021-11-14 23:00:08 -08:00
parent 7959f7628d
commit 7ce1692eef
1 changed files with 1 additions and 1 deletions
@@ -51,7 +51,7 @@ def registry_path_ghostscript(env=None) -> Iterator[Path]:
        with winreg.OpenKey(
            winreg.HKEY_LOCAL_MACHINE, r"SOFTWARE\Artifex\GPL Ghostscript"
        ) as k:
-            latest_gs = max(registry_subkeys(k), key=LooseVersion)
+            latest_gs = max(registry_subkeys(k), key=LooseVersion, default='0')
        with winreg.OpenKey(
            winreg.HKEY_LOCAL_MACHINE, fr"SOFTWARE\Artifex\GPL Ghostscript\{latest_gs}"
        ) as k: