Better comment

src/util/samplebuffer.cpp

@@ -12,7 +12,10 @@ SampleBuffer::SampleBuffer(SINT size)
 SampleBuffer::~SampleBuffer() {
     SampleUtil::free(m_data);
 
-    /* cleanup the memory, just in case of use after free */
+    // Cleanup the pointer, because if this object is used after free,
+    // it is preferable to have a null pointer rather than a heap pointer
+    // which will in the best case lead to a crash and worst case just
+    // corrupt random heap memory and make it hard to find the root issue.
     m_data = nullptr;
     m_size = 0;
 }