Don't assign through a NULL pointer.

SVN-Revision: 256

diff --git a/libarchive/archive_read.c b/libarchive/archive_read.c
index 24e2596b79fdea2f4f5fb8e0d7bd7199226bd139..e986dfb81941231cc1f4b72336f7bde5428b2704 100644 (file)
--- a/libarchive/archive_read.c
+++ b/libarchive/archive_read.c
@@ -793,7 +793,8 @@ __archive_read_ahead(struct archive_read *a, size_t min, ssize_t *avail)
        size_t tocopy;
 
        if (a->fatal) {
-               *avail = ARCHIVE_FATAL;
+               if (avail)
+                       *avail = ARCHIVE_FATAL;
                return (NULL);
        }