reduce calls to realloc() if size did not change.

diff --git a/libkmod/libkmod-index.c b/libkmod/libkmod-index.c
index c3252fe..a0cb510 100644 (file)
--- a/libkmod/libkmod-index.c
+++ b/libkmod/libkmod-index.c
@@ -120,6 +120,9 @@ static bool buf_grow(struct buffer *buf, size_t 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;