修复删除人脸的bug

src/main/java/com/xjrsoft/module/personnel/service/impl/TeacherFaceProcessServiceImpl.java

@@ -57,9 +57,11 @@ public class TeacherFaceProcessServiceImpl extends MPJBaseServiceImpl<TeacherFac
                             .eq(FaceManagement::getUserId, process.getUserId())
                             .eq(FaceManagement::getFileId, process.getFacePhoto())
             );
+            if(faceManagement != null){
+                faceManagement.setRegisterBase64(null);
+                faceManagementService.update(faceManagement);
+            }
 
-            faceManagement.setRegisterBase64(null);
-            faceManagementService.update(faceManagement);
         }
         return true;
     }