Refactor isThisSetStateCallback function so it doesnt duplicate code

Author: tobilen

lib/rules/no-this-state-props.js

@@ -35,12 +35,12 @@ module.exports = {
 
     function isThisSetStateCallback (node) {
       if ( node.parent && node.parent.type === 'CallExpression' ) {
-        var callee = node.parent.callee;
+        var parent = node.parent;
         var isMatching = (
-          callee.type === 'MemberExpression' &&
-          callee.object.type === 'ThisExpression' &&
-          callee.property.name === 'setState' &&
-          node.parent.arguments[1] === node
+          isThisSetState(parent) &&
+          parent.arguments &&
+          parent.arguments.length > 1 &&
+          parent.arguments[1] === node
         )
         return isMatching
       }