From: Rudolf Polzer <divverent@xonotic.org>
Date: Sun, 27 Nov 2011 13:15:18 +0000 (+0100)
Subject: fix one possible NULL bug in d0_bignum-gmp
X-Git-Tag: v0.5~4
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=fa477630c69d155b61397375d4769c55bb9d3e14;p=xonotic%2Fd0_blind_id.git

fix one possible NULL bug in d0_bignum-gmp
---

diff --git a/d0_bignum-gmp.c b/d0_bignum-gmp.c
index 95b95e2..d5da8b5 100644
--- a/d0_bignum-gmp.c
+++ b/d0_bignum-gmp.c
@@ -74,7 +74,8 @@ static void *reallocate_function (void *ptr, size_t old_size, size_t new_size)
 	if(old_size == new_size)
 		return ptr;
 	data = d0_malloc(new_size);
-	memcpy(data, ptr, (old_size < new_size) ? old_size : new_size);
+	if(ptr && data)
+		memcpy(data, ptr, (old_size < new_size) ? old_size : new_size);
 	d0_free(ptr);
 	return data;
 }