fix multiple table selection

git-svn-id: http://svn.osgeo.org/qgis/trunk/qgis@8675 c8812cc2-4d05-0410-92ff-de0c093fc19c

src/app/qgsdbsourceselect.cpp

@@ -327,7 +327,7 @@ void QgsDbSourceSelect::addTables()
         }
       }
 
-      query += "\"" + schemaName + "\".\"" + tableName + "\" " + "(" + geomColumnName + ") sql=" + sql;
+      query = "\"" + schemaName + "\".\"" + tableName + "\" " + "(" + geomColumnName + ") sql=" + sql;
 
       m_selectedTables.push_back(query);
     }