fix crash in datauri dpi

noticed by: corvid <corvid@lavabit.com> and
            Jeremy Henty's valgrind logs

1 files changed, 1 insertions, 1 deletions

diff --git a/dpi/datauri.c b/dpi/datauri.c
index 055ecd9f..0e3560ec 100644
--- a/dpi/datauri.c
+++ b/dpi/datauri.c
@@ -150,8 +150,8 @@ char *a_Url_decode_hex_str(const char *str, size_t *p_sz)
    }
    *dest = 0;
 
-   new_str = dRealloc(new_str, sizeof(char) * (dest - new_str + 1));
    *p_sz = (size_t)(dest - new_str);
+   new_str = dRealloc(new_str, sizeof(char) * (dest - new_str + 1));
    return new_str;
 }