trivial update to ModelViewEntity.java
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Key: OFBIZ-4523
URL: https://issues.apache.org/jira/browse/OFBIZ-4523
Project: OFBiz
Issue Type: Bug
Components: framework
Affects Versions: SVN trunk
Reporter: Leon
Priority: Trivial
Fix For: SVN trunk
Since the relFieldName of ViewConditionExpr object could never been null, so
correct comparation "this.relFieldName == null" to
"UtilValidate.isEmpty(this.relFieldName)".
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