avgPageLoadTime Metric Reports Zero if segment applied

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Name of affected component: Core Reporting API

Name of related library and version, if applicable (e.g. Java, Python,
HTTP, Objective-C, etc.):

Issue summary:
When executing a reporting API query that contains both the metric 
avgPageLadTime and a segment (for example: deviceCategory==desktop), the value 
for the metric is returned as zero.  This has worked flawlessly in the past.  I 
can still pull both pageLoadSample and pageLoadTime.  So I am able to perform 
my own calculation, but the API should be able to pull this metric directly.

Steps to reproduce issue:
1.
2.
3.

Expected output:
The actual value of (ga:pageLoadTime / ga:pageLoadSample / 1000) NOT zero

Actual results:
Zero for value of metric

Notes:

Original issue reported on code.google.com by j48g...@gmail.com on 9 Dec 2014 at 7:05