check for errors in query json, and correctly log them

video_metadata/static/file_listing.js

@@ -47,6 +47,10 @@ function openQueryDialog(dataset) {
 		+ '?query=' + dataset.base_name
 		+ '&rel_path=' + dataset.rel_path;
 	fetchJSON(query_str, function(json) {
+		if (json.errors) {
+			for (let e of json.errors)
+				logError(e)
+		} else {
 			let tcontainer = document.querySelector('#query_results');
 			let tclone = document.importNode(tcontainer.content, true);
 			let close = tclone.querySelector('#query_close');
@@ -73,6 +77,7 @@ function openQueryDialog(dataset) {
 			}
 
 			document.querySelector('body').appendChild(tclone);
+		}
 	});
 }