Prefer os.path.expanduser to manual handling of $HOME.

This may make it work (better) on Windows, assuming anybody wants to try.

pastebinit

@@ -26,7 +26,7 @@ try:
 
     defaultPB = "http://pastebin.com" #Default pastebin
     version = "0.11.2" #Version number to show in the usage
-    configfile = os.environ.get('HOME') + "/.pastebinit.xml"
+    configfile = os.path.expanduser("~/.pastebinit.xml")
 
     # Custom urlopener to handle 401's
     class pasteURLopener(urllib.FancyURLopener):