pywizards: absolutize fails in Windows with backslash

I don't have a way to test it in Windows, so I hope it fixed now

Change-Id: I0f24aadb26c0d091fa95d9fcc655fa876c4b18db

wizards/com/sun/star/wizards/document/OfficeDocument.py

@@ -16,8 +16,9 @@
 #   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 #
 import uno
+import os.path
 import traceback
-from unohelper import absolutize, systemPathToFileUrl
+from unohelper import systemPathToFileUrl
 from ..ui.event.CommonListener import TerminateListenerProcAdapter
 from ..common.Desktop import Desktop
 
@@ -209,10 +210,8 @@ class OfficeDocument(object):
             else:
                 oStoreProperties = list(range(0))      
 
-            sPath = StorePath[:(StorePath.rfind("/") + 1)]
-            sFile = StorePath[(StorePath.rfind("/") + 1):]
             xComponent.storeToURL(
-                absolutize(systemPathToFileUrl(sPath), sFile),
+                os.path.abspath(systemPathToFileUrl(StorePath)),
                 tuple(oStoreProperties))
             return True
         except ErrorCodeIOException: