liblzma: Add NULL check to lzma_index_hash_append.

This is for consistency with lzma_index_append.

diff --git a/src/liblzma/common/index_hash.c b/src/liblzma/common/index_hash.c
index c3c5667468ee547a1e6edd55960d7108ba0f7e03..f55f7bc8ff8f24de7508ff8a3b999fc5b258e9dc 100644 (file)
--- a/src/liblzma/common/index_hash.c
+++ b/src/liblzma/common/index_hash.c
@@ -145,7 +145,7 @@ lzma_index_hash_append(lzma_index_hash *index_hash, lzma_vli unpadded_size,
                lzma_vli uncompressed_size)
 {
        // Validate the arguments.
-       if (index_hash->sequence != SEQ_BLOCK
+       if (index_hash == NULL || index_hash->sequence != SEQ_BLOCK
                        || unpadded_size < UNPADDED_SIZE_MIN
                        || unpadded_size > UNPADDED_SIZE_MAX
                        || uncompressed_size > LZMA_VLI_MAX)