[bugfix] Fixed NPE if XQuery source is not found.  Writes a warning to the log in that case now. Port of rev. 7288 from trunk.
[bugfix] Fixed NPE if XQuery source is not found.  Writes a warning to the log in that case now. Port of rev. 7288 from trunk.

svn path=/branches/eXist-stable-1.2/; revision=7298

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