Try harder to disable Snappy

Author: joshmoore

setup.py

@@ -79,7 +79,9 @@ def blosc_extension():
     define_macros += [('HAVE_LZ4', 1),
                       ('HAVE_SNAPPY', 0),
                       ('HAVE_ZLIB', 1),
-                      ('HAVE_ZSTD', 1)]
+                      ('HAVE_ZSTD', 1),
+                      ('DEACTIVATE_SNAPPY', 1),
+                      ]
     # define_macros += [('CYTHON_TRACE', '1')]
 
     # SSE2