Workaround for bug #1558983

There is an issue with custom icons on directories in the 2.5c2 installer,
don't set a custom icon on "/Applications/MacPython 2.5" for now.

Also make sure that the installer doesn't crap out when the Makefile in the
system's python installation has other customizations than we expect.
diff --git a/Mac/Tools/fixapplepython23.py b/Mac/Tools/fixapplepython23.py
index fb8645a..6ba5401 100644
--- a/Mac/Tools/fixapplepython23.py
+++ b/Mac/Tools/fixapplepython23.py
@@ -123,7 +123,8 @@
             makescript(GXX_SCRIPT, "g++")
     #  Finally fix the makefile
     rv = fix(MAKEFILE, do_apply)
-    sys.exit(rv)
+    #sys.exit(rv)
+    sys.exit(0)
 
 if __name__ == '__main__':
     main()