Fix #377 - clear SectionParam form results before adding fixed params

src/app/formulaire/definition/form-section-parametree.ts

@@ -27,6 +27,7 @@ export class FormulaireSectionParametree extends FormulaireSection {
     }
 
     protected reaffectResultComponents() {
+        this.resetFormResults(); // to avoid adding fixed parameters more than once (see below)
         const sectNub: SectionParametree = this.currentNub as SectionParametree;
         const sect: acSection = sectNub.section;
         this._sectionResults.section = sect;