优化 src判断

src/views/Editor/EditorHeader/index.vue

@@ -252,7 +252,7 @@ const uploadImageHandler = async ()=>{
     for (let i = 0; i < slides.value.length; i++) {
       const slide = slides.value[i];
       if(slide.elements){
-        let temp = slide.elements.filter(x => "src" in x && x.src.startsWith("data:image")) ?? []
+        let temp = slide.elements.filter(x => "src" in x && x.src && x.src.startsWith("data:image")) ?? []
         for(let j = 0; j < temp.length; j++){
           index++
           loadingInstance.value.text = `当前图片处理进度：${index} / ${count}`