Rename nMaxNumSize to MAX_NUM_SIZE

This is a constant; not meant to be changed.

 [ yapified by gitreformat (github/ghtdak) on Mon Nov 30 21:11:10 2015 ]

Author: petertodd

bitcoin/core/scripteval.py

@@ -34,7 +34,7 @@
 # we're not exporting the whole contents of the script module.
 from bitcoin.core.script import *
 
-nMaxNumSize = 4
+MAX_NUM_SIZE = 4
 MAX_STACK_ITEMS = 1000
 
 SCRIPT_VERIFY_P2SH = object()
@@ -114,7 +114,7 @@ def __init__(self, opcode, **kwargs):
 
 def _CastToBigNum(s, err_raiser):
     v = bitcoin.core.bignum.vch2bn(s)
-    if len(s) > nMaxNumSize:
+    if len(s) > MAX_NUM_SIZE:
         raise err_raiser(EvalScriptError, 'CastToBigNum() : overflow')
     return v