fixed 健康護照沒照片問題

src/fe/healthpassport/js/register.js

@@ -81,7 +81,7 @@ function useRegister(delegate) {
 
 		linePicUrl = url;
 		const imageURL = linePicUrl;
-		if(imageURL !== '') {
+		if(imageURL) {
 			const img = new Image();
 			img.crossOrigin = 'anonymous';
 			img.onload = function() {