Fix build error on win32-py2.6

Author: cgohlke

MANIFEST.in

@@ -9,7 +9,7 @@ include lib/matplotlib/mpl-data/images/*
 include lib/matplotlib/mpl-data/fonts/ttf/*
 include lib/matplotlib/mpl-data/fonts/pdfcorefonts/*
 include lib/matplotlib/mpl-data/fonts/afm/*
-recursive-include lib/matplotlib/mpl-data/sample_data/ *
+recursive-include lib/matplotlib/mpl-data/sample_data/*
 recursive-include LICENSE *
 recursive-include examples *
 recursive-include doc *