got rid of magic number

interp/grid/__init__.py

@@ -12,6 +12,8 @@ import interp.grid.simplex
 import logging
 log = logging.getLogger("interp")
 
+MAX_SEARCH_COUNT = 128
+
 class grid(object):
   def __init__(self, verts = None, q = None):
     """
@@ -55,7 +57,7 @@ class grid(object):
     while not simplex and cells_to_check:
       attempts += 1
 
-      if attempts > 200:
+      if attempts > MAX_SEARCH_COUNT:
         raise Exception("Is the search becoming exhaustive?")
 
       cur_cell = cells_to_check.pop(0)