utils strbuf: Don't copy more than needed in sdb_strbuf_skip().

diff --git a/src/utils/strbuf.c b/src/utils/strbuf.c
index ee419b7ea20994efaeeaac3d6ae1d246c402dcb0..822f01928c4437b40bb4d621f905cf0b649cea6a 100644 (file)
--- a/src/utils/strbuf.c
+++ b/src/utils/strbuf.c
@@ -306,7 +306,7 @@ sdb_strbuf_skip(sdb_strbuf_t *strbuf, size_t offset, size_t n)
        assert(offset < strbuf->pos);
 
        start = strbuf->string + offset;
-       memmove(start, start + n, strbuf->pos - n);
+       memmove(start, start + n, len - n);
        strbuf->pos -= n;
        strbuf->string[strbuf->pos] = '\0';
 } /* sdb_strbuf_skip */