fix: fish ladder generation dialog: set rounding precision to 3 digits

refs #543

src/app/components/dialog-generate-pab/dialog-generate-pab.component.ts

@@ -26,7 +26,7 @@ export class DialogGeneratePABComponent {
         private appSetupService: ApplicationSetupService,
         @Inject(MAT_DIALOG_DATA) public data: any
     ) {
-        const nDigits = this.appSetupService.displayPrecision;
+        const nDigits = 3;  // nghyd#543
         this.coteAmont = data.coteAmont ? round(data.coteAmont, nDigits) : undefined;
         this.debit = data.debit ? round(data.debit, nDigits) : undefined;
         this.nbBassins = data.nbBassins;