Sql_lib: SqlBuilder accepts conditions constants like: SqlBuilder.EQUAL (the whole function)

using Util_lib for typecheck now

process/Sql_lib/process.js

@@ -1455,7 +1455,7 @@ SqlBuilder.prototype._addWhere = function(pFieldOrCond, pValue, pMandatory, pCon
             pCondition = resCond[0];
             pFieldType = pFieldType || resCond[1];
         }
-        else if(typeof(resCond) == "string")
+        else if(Utils.isString(pCondition))
         {
             pCondition = resCond;
         }