do not show error message when file does not exist, fixed return

openlp/core/ui/servicemanager.py

@@ -483,6 +483,7 @@ class ServiceManager(QtGui.QWidget):
         allow_zip_64 = (total_size > 2147483648 + len(service_content))
         log.debug(u'ServiceManager.saveFile - allowZip64 is %s' % allow_zip_64)
         zip = None
+        success = True
         try:
             zip = zipfile.ZipFile(path_file_name, 'w', zipfile.ZIP_STORED,
                 allow_zip_64)
@@ -494,13 +495,16 @@ class ServiceManager(QtGui.QWidget):
                 zip.write(path_from, path_from.encode(u'utf-8'))
         except IOError:
             log.exception(u'Failed to save service to disk')
-            return False
+            success = False
         finally:
             if zip:
                 zip.close()
-        self.mainwindow.addRecentFile(path_file_name)
-        self.setModified(False)
-        return True
+        if success:
+            self.mainwindow.addRecentFile(path_file_name)
+            self.setModified(False)
+        else:
+            delete_file(path_file_name)
+        return success
 
     def saveFileAs(self):
         """
@@ -525,8 +529,9 @@ class ServiceManager(QtGui.QWidget):
     def loadFile(self, fileName):
         if not fileName:
             return False
-        else:
-            fileName = unicode(fileName)
+        fileName = unicode(fileName)
+        if not os.path.exists(fileName):
+            return False
         zip = None
         fileTo = None
         try: