Eric Banks 94540ccc27 Using the simple VCBuilder constructor and then subsequently trying to modify attributes was throwing a NPE. This is easily solved (without a performance hit) by initializing the attributes map to an immutable Collections.emptyMap(). Added unit test to cover this case.		2012-08-22 12:54:29 -04:00
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broadinstitute/sting	Using the simple VCBuilder constructor and then subsequently trying to modify attributes was throwing a NPE. This is easily solved (without a performance hit) by initializing the attributes map to an immutable Collections.emptyMap(). Added unit test to cover this case.	2012-08-22 12:54:29 -04:00