Update XZ Utils to 5.0.4 (third_party)

src/liblzma/common/index.c

 ///////////////////////////////////////////////////////////////////////////////
 //
 /// \file       index.c
 /// \brief      Handling of .xz Indexes and some other Stream information
 //
 //  Author:     Lasse Collin
 //
 //  This file has been put into the public domain.
 //  You can do whatever you want with this file.
 //
@@ skipping 380 matching lines @@
         }
 
         return i;
 }
 
 
 extern LZMA_API(lzma_index *)
 lzma_index_init(lzma_allocator *allocator)
 {
         lzma_index *i = index_init_plain(allocator);
+        if (i == NULL)
+                return NULL;
+
         index_stream *s = index_stream_init(0, 0, 1, 0, allocator);
-        if (i == NULL || s == NULL) {
-                index_stream_end(s, allocator);
+        if (s == NULL) {
                 lzma_free(i, allocator);
+                return NULL;
         }
 
         index_tree_append(&i->streams, &s->node);
 
         return i;
 }
 
 
 extern LZMA_API(void)
 lzma_index_end(lzma_index *i, lzma_allocator *allocator)
@@ skipping 817 matching lines @@
         }
 
         iter->internal[ITER_STREAM].p = stream;
         iter->internal[ITER_GROUP].p = group;
         iter->internal[ITER_RECORD].s = left;
 
         iter_set_info(iter);
 
         return false;
 }