[zanata/zanata-common] bb7220: Handle null prefix

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/zanata/zanata-common
  Commit: bb7220898b4affa6d7dd29f8b46953ead4aba064
      https://github.com/zanata/zanata-common/commit/bb7220898b4affa6d7dd29f8b46953ead4aba064
  Author: Sean Flanigan <sflaniga at redhat.com>
  Date:   2013-08-11 (Sun, 11 Aug 2013)

  Changed paths:
    M zanata-common-util/src/main/java/org/zanata/common/util/ElementBuilder.java

  Log Message:
  -----------
  Handle null prefix