Second attempt to update lzma_sdk to 9.20

third_party/lzma_sdk/Alloc.h

Index: third_party/lzma_sdk/Alloc.h
diff --git a/third_party/lzma_sdk/Alloc.h b/third_party/lzma_sdk/Alloc.h
index d748cb186553287d7453b1638c31bea10163fc19..b8e4143677da1753237f41a27acb1c6a425466a5 100644
--- a/third_party/lzma_sdk/Alloc.h
+++ b/third_party/lzma_sdk/Alloc.h
@@ -1,10 +1,15 @@
-/* Alloc.h */
+/* Alloc.h -- Memory allocation functions
+2009-02-07 : Igor Pavlov : Public domain */
 
 #ifndef __COMMON_ALLOC_H
 #define __COMMON_ALLOC_H
 
 #include <stddef.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void *MyAlloc(size_t size);
 void MyFree(void *address);
 
@@ -26,4 +31,8 @@ void BigFree(void *address);
 
 #endif
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif