Fix external propTypes handling (fixes #545)

Author: yannickcr

lib/rules/prop-types.js

@@ -661,6 +661,8 @@ module.exports = Components.detect(function(context, components, utils) {
         if (propTypes && propTypes.parent && propTypes.property) {
           curDeclaredPropTypes[propTypes.property.name] =
             buildReactDeclarationTypes(propTypes.parent.right);
+        } else {
+          ignorePropsValidation = true;
         }
         break;
       case 'Identifier':

tests/lib/rules/prop-types.js

@@ -110,6 +110,16 @@ ruleTester.run('prop-types', rule, {
         '});'
       ].join('\n'),
       parserOptions: parserOptions
+    }, {
+      code: [
+        'var Hello = React.createClass({',
+        '  propTypes: externalPropTypes.mySharedPropTypes,',
+        '  render: function() {',
+        '    return <div>Hello {this.props.name}</div>;',
+        '  }',
+        '});'
+      ].join('\n'),
+      parserOptions: parserOptions
     }, {
       code: [
         'class Hello extends React.Component {',