Fix crash when destructuring with only the rest spread (fixes #269)

Author: yannickcr

lib/rules/prop-types.js

@@ -180,7 +180,7 @@ module.exports = Components.detect(function(context, components) {
    * @return {string} the name of the key
    */
   function getKeyValue(node) {
-    var key = node.key;
+    var key = node.key || node.argument;
     return key.type === 'Identifier' ? key.name : key.value;
   }
 

tests/lib/rules/prop-types.js

@@ -917,6 +917,24 @@ ruleTester.run('prop-types', rule, {
         '}'
       ].join('\n'),
       parser: 'babel-eslint'
+    }, {
+      code: [
+        'var Hello = React.createClass({',
+        '  render: function() {',
+        '    var {...other} = this.props;',
+        '    return (',
+        '      <div {...other} />',
+        '    );',
+        '  }',
+        '});'
+      ].join('\n'),
+      env: {
+        es6: true
+      },
+      ecmaFeatures: {
+        jsx: true,
+        experimentalObjectRestSpread: true
+      }
     }
   ],