Merge pull request #260 from ejsd1989/issue-#242

Removes redundant null pointer checks checks

src/google/protobuf/compiler/cpp/cpp_bootstrap_unittest.cc

@@ -107,7 +107,7 @@ class MockGeneratorContext : public GeneratorContext {
 
   virtual io::ZeroCopyOutputStream* Open(const string& filename) {
     string** map_slot = &files_[filename];
-    if (*map_slot != NULL) delete *map_slot;
+    delete *map_slot;
     *map_slot = new string;
 
     return new io::StringOutputStream(*map_slot);

src/google/protobuf/io/gzip_stream.cc

@@ -241,9 +241,7 @@ void GzipOutputStream::Init(ZeroCopyOutputStream* sub_stream,
 
 GzipOutputStream::~GzipOutputStream() {
   Close();
-  if (input_buffer_ != NULL) {
-    operator delete(input_buffer_);
-  }
+  operator delete(input_buffer_);
 }
 
 // private