By Dawn Chmielewski LOS ANGELES, Feb 2 (Reuters) - Walt Disney's warning that a decline in international visitors to its U.S. theme parks and a slump in earnings at its TV and film division sent shares down nearly 5% in trading on Monday, just as ​it readies a successor to outgoing CEO Bob Iger. The company said there were "headwinds" among international visitors without giving a reason at a ‌time when foreign travel to the United States has been waning. CFO Hugh Johnston added that Disney is focusing pr ...