fix testing for undefined

Signed-off-by: Florian Schunk <florian.schunk@rwth-aachen.de>

Author: rummatee

apps/files/js/filelist.js

@@ -919,7 +919,7 @@
 
 			var actions = this.isSelectedMovable() ? OC.dialogs.FILEPICKER_TYPE_COPY_MOVE : OC.dialogs.FILEPICKER_TYPE_COPY;
 			var dialogDir = self.getCurrentDirectory();
-			if (self.dirInfo.dirLastCopiedTo != undefined) {
+			if (typeof self.dirInfo.dirLastCopiedTo !== undefined) {
 				dialogDir = self.dirInfo.dirLastCopiedTo;
 			}
 			OC.dialogs.filepicker(t('files', 'Choose target folder'), function(targetPath, type) {

core/js/oc-dialogs.js

@@ -213,9 +213,7 @@ var OCdialogs = {
 		this.filepicker.loading = true;
 		this.filepicker.filesClient = (OCA.Sharing && OCA.Sharing.PublicApp && OCA.Sharing.PublicApp.fileList)? OCA.Sharing.PublicApp.fileList.filesClient: OC.Files.getClient();
 
-		if (path == undefined) {
-			path = '';
-		}
+		path = path || '';
 
 		$.when(this._getFilePickerTemplate()).then(function($tmpl) {
 			self.filepicker.loading = false;