Handle calls to win32_ver from non-Windows platform
diff --git a/Lib/platform.py b/Lib/platform.py
index 6eb456b..ad425a1 100755
--- a/Lib/platform.py
+++ b/Lib/platform.py
@@ -546,7 +546,10 @@
     return maj, min, build
 
 def win32_ver(release='', version='', csd='', ptype=''):
-    from sys import getwindowsversion
+    try:
+        from sys import getwindowsversion
+    except ImportError:
+        return release, version, csd, ptype
     try:
         from winreg import OpenKeyEx, QueryValueEx, CloseKey, HKEY_LOCAL_MACHINE
     except ImportError: