text: fix bug with adding at end of allocation.

Signed-off-by: NeilBrown <neil@brown.name>

diff --git a/doc-text.c b/doc-text.c
index 2b8550ec353a4ee3aed993d71dbef4f3b17638ee..930b22d4eef4ce1b271f336efdc2a97f25c460a0 100644 (file)
--- a/doc-text.c
+++ b/doc-text.c
@@ -353,15 +353,18 @@ static void text_add_str(struct text *t, struct doc_ref *pos, char *str,
         */
        struct text_alloc *a = t->alloc;
        int len = strlen(str);
+       int len2;
 
        if (start)
                *start = *pos;
 
+       len2 = len;
        if (pos->c && pos->o == pos->c->end &&
            pos->c->txt + pos->o == a->text + a->free &&
            (a->size - a->free >= len ||
-            (len = text_round_len(str, a->size - a->free)) > 0)) {
+            (len2 = text_round_len(str, a->size - a->free)) > 0)) {
                /* Some of this ('len') can be added to the current chunk */
+               len = len2;
                memcpy(a->text+a->free, str, len);
                a->free += len;
                pos->c->end += len;