call cython numpy import_array() in a few places

Author: mrjbq7

talib/_abstract.pxi

@@ -15,6 +15,7 @@ cimport numpy as np
 cimport _ta_lib as lib
 # NOTE: _ta_check_success, MA_Type is defined in _common.pxi
 
+np.import_array() # Initialize the NumPy C API
 
 # lookup for TALIB input parameters which don't define expected price series inputs
 __INPUT_PRICE_SERIES_DEFAULTS = {'price':   'close',

talib/_stream.pxi

@@ -3,8 +3,8 @@ from cython import boundscheck, wraparound
 cimport _ta_lib as lib
 from _ta_lib cimport TA_RetCode
 # NOTE: _ta_check_success, NaN are defined in common.pxi
-#       NumPy C API is initialize in _func.pxi
 
+np.import_array() # Initialize the NumPy C API
 
 @wraparound(False)  # turn off relative indexing from end of lists
 @boundscheck(False) # turn off bounds-checking for entire function