refactor: use ParamsEquation.iterator

refs #609

src/app/formulaire/definition/form-prebarrage.ts

@@ -356,7 +356,7 @@ export class FormulairePrebarrage extends FormulaireFixedVar {
             if(withChildren) {
                 prmIt = this.currentNub.parameterIterator;
             } else {
-                prmIt = new ParamDefinitionIterator(this.currentNub.prms);
+                prmIt = this.currentNub.prms.iterator;
             }
             const uids: string[] = [];
             for (const p of prmIt) {