strbuf: do not calculate next step in size on all calls

We only need to check if the new size is less or equal than the current
size. We don't really need to calculate the next step.

1 files changed, 3 insertions, 3 deletions

diff --git a/shared/strbuf.c b/shared/strbuf.c
index a11f638..af445d9 100644
--- a/shared/strbuf.c
+++ b/shared/strbuf.c
@@ -33,14 +33,14 @@ static bool buf_grow(struct strbuf *buf, size_t newsize)
 	void *tmp;
 	size_t sz;
 
+	if (newsize <= buf->size)
+		return true;
+
 	if (newsize % BUF_STEP == 0)
 		sz = newsize;
 	else
 		sz = ((newsize / BUF_STEP) + 1) * BUF_STEP;
 
-	if (buf->size == sz)
-		return true;
-
 	tmp = realloc(buf->bytes, sz);
 	if (sz > 0 && tmp == NULL)
 		return false;