FIX: Get OSError.errno by name, not index

Author: effigies

nipype/utils/subprocess.py

@@ -124,7 +124,7 @@ def _process(drain=0):
                 res = select.select(streams, [], [], timeout)
             except select.error as e:
                 iflogger.info(e)
-                if e[0] == errno.EINTR:
+                if e.errno == errno.EINTR:
                     return
                 else:
                     raise