reset apple veclib to use 1 thread

Author: samuelstjean

scripts/nlsam_denoising

@@ -3,10 +3,15 @@
 from __future__ import division, print_function
 
 import os
+
 # Fix openblas threading bug with openmp before loading numpy
 # Spams has openmp support already, and openblas conflicts with python multiprocessing.
 os.environ['OPENBLAS_NUM_THREADS'] = '1'
 
+# Mac OSX has it's own blas/lapack, but like openblas it causes conflict for
+# python 2.7 and before python 3.4 in multiprocessing, so disable it.
+os.environ['VECLIB_MAXIMUM_THREADS'] = '1'
+
 import argparse
 import logging
 from multiprocessing import cpu_count, freeze_support