Second attempt to update lzma_sdk to 9.20

third_party/lzma_sdk/7zBuf.c

Index: third_party/lzma_sdk/7zBuf.c
diff --git a/third_party/lzma_sdk/7zBuf.c b/third_party/lzma_sdk/7zBuf.c
new file mode 100644
index 0000000000000000000000000000000000000000..14e7f4e2b92215c6a6ba4186917b4602d620fe9a
--- /dev/null
+++ b/third_party/lzma_sdk/7zBuf.c
@@ -0,0 +1,36 @@
+/* 7zBuf.c -- Byte Buffer
+2008-03-28
+Igor Pavlov
+Public domain */
+
+#include "7zBuf.h"
+
+void Buf_Init(CBuf *p)
+{
+  p->data = 0;
+  p->size = 0;
+}
+
+int Buf_Create(CBuf *p, size_t size, ISzAlloc *alloc)
+{
+  p->size = 0;
+  if (size == 0)
+  {
+    p->data = 0;
+    return 1;
+  }
+  p->data = (Byte *)alloc->Alloc(alloc, size);
+  if (p->data != 0)
+  {
+    p->size = size;
+    return 1;
+  }
+  return 0;
+}
+
+void Buf_Free(CBuf *p, ISzAlloc *alloc)
+{
+  alloc->Free(alloc, p->data);
+  p->data = 0;
+  p->size = 0;
+}