Don't fail in own_buf if items_written is NULL

diff --git a/src/util.c b/src/util.c
index de509c7..84ce507 100644 (file)
--- a/src/util.c
+++ b/src/util.c
@@ -596,7 +596,7 @@ unsigned char *pack_7bit_own_buf(const unsigned char *in, long len,
        long i;
        long total_bits;
 
-       if (len == 0 || !items_written)
+       if (len == 0)
                return NULL;
 
        if (len < 0) {
@@ -651,7 +651,8 @@ unsigned char *pack_7bit_own_buf(const unsigned char *in, long len,
                out++;
        }
 
-       *items_written = out - buf;
+       if (items_written)
+               *items_written = out - buf;
 
        return buf;
 }