fix: select field: check default value

src/app/formulaire/elements/select/select-field.ts

@@ -133,6 +133,9 @@ export abstract class SelectField extends Field {
                 val = this._entries[0];
             } else {
                 val = this.getEntryFromValue(enumValueFromString(this._associatedProperty, this._configDefaultValue));
+                if (val === undefined) {
+                    throw Error("invalid select default value " + this._configDefaultValue + " for " + this._associatedProperty + " property");
+                }
             }
             if (this._multiple) {
                 this.setValue([val]);