[그룹가입] 콘솔 에러 수정

src/components/basis/group/BasisGroupDetailJoinSearch.js

@@ -61,7 +61,7 @@ export const BasisGroupDetailJoinSearch = props => {
                                   type='text'
                                   id='groupNm'
                                   name='groupNm'
-                                  value={props.params.groupNm}
+                                  value={props.params.groupNm || ''}
                                   onChange={props.handlerInput}
                                   bsSize='sm'
                                   placeholder='그룹명을 입력하세요'
@@ -84,7 +84,7 @@ export const BasisGroupDetailJoinSearch = props => {
                                   id='groupId'
                                   name='groupId'
                                   onChange={props.handlerInput}
-                                  value={props.params.groupId}
+                                  value={props.params.groupId || ''}
                                   onKeyPress={props.onKeyPress}
                                   bsSize='sm'
                                   placeholder='그룹코드를 입력하세요'