[ 1679692 ] fireDocValidate doesn't treat exceptions as errors

http://sourceforge.net/tracker/?func=detail&atid=879332&aid=1679692&group_id=176962

dbPort/src/org/compiere/model/ModelValidationEngine.java

@@ -286,7 +286,12 @@ public class ModelValidationEngine
 			}
 			catch (Exception e)
 			{
-				log.log(Level.SEVERE, validator.toString(), e);
+				// Exeptions are errors and should stop the document processing - teo_sarca [ 1679692 ]
+				// log.log(Level.SEVERE, validator.toString(), e);
+				String error = e.getMessage();
+				if (error == null)
+					error = e.toString();
+				return error;
 			}
 		}
 		return null;