graphite-project/graphite-web — pull request #806 by dpkp (2014-08-02 20:31:21+00:00)
Title: Fix indentity function

convert time.mktime floats to int for start and end time values

currently attempts to use the identify() function crash with:
```
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 111, in get_response
response = callback(request, *callback_args, **callback_kwargs)
File "/opt/graphite/webapp/graphite/render/views.py", line 110, in renderView
seriesList = evaluateTarget(requestContext, target)
File "/opt/graphite/webapp/graphite/render/evaluator.py", line 10, in evaluateTarget
result = evaluateTokens(requestContext, tokens)
File "/opt/graphite/webapp/graphite/render/evaluator.py", line 21, in evaluateTokens
return evaluateTokens(requestContext, tokens.expression)
File "/opt/graphite/webapp/graphite/render/evaluator.py", line 29, in evaluateTokens
return func(requestContext, *args)
File "/opt/graphite/webapp/graphite/render/functions.py", line 2176, in identity
values = range(start, end, step)
TypeError: range() integer end argument expected, got float.
```