Fix: don't throw on empty block with "requirePaddingNewLinesAfterBlocks"

Fixes #1952

Author: markelog

lib/rules/require-padding-newlines-after-blocks.js

@@ -131,7 +131,7 @@ function isException(parent, exceptions) {
     var grandpa = parent.parentNode;
 
     // Check if this block is used in call or array expression
-    if (exceptions[grandpa.type]) {
+    if (grandpa && exceptions[grandpa.type]) {
         return true;
     }
 

test/specs/rules/require-padding-newlines-after-blocks.js

@@ -10,6 +10,11 @@ describe('rules/require-padding-newlines-after-blocks', function() {
         checker.registerDefaultRules();
     });
 
+    it('should not throw expections with blocks', function() {
+        checker.configure({ requirePaddingNewLinesAfterBlocks: true });
+        expect(checker.checkString('{}')).to.have.no.errors();
+    });
+
     describe('invalid options', function() {
         it('should throw if empty object', function() {
             expect(function() {