修复修改task会报location为null的问题

src/components/task/Task.vue

@@ -59,8 +59,8 @@
               <provincecity
                 ref="addFormProvince"
                 @selectChange="locationChange"
-                :provinceCode="task.location.provinceCode"
-                :cityCode="task.location.cityCode"
+                :provinceCode="task.location == null ||task.location.provinceCode==null?'3200':task.location.provinceCode"
+                :cityCode="task.location == null ||task.location.cityCode==null?'3201':task.location.cityCode"
               ></provincecity>
             </el-tab-pane>
             <el-tab-pane :label="resourceType[2]" name="2"></el-tab-pane>