Old-style callbacks can be NULL!

diff --git a/crypto/bn/bn_prime.c b/crypto/bn/bn_prime.c
index 6c16029957ed7f43eac0c4783e3c68989121af4c..fd863933e5f8426abe3582ec53c2eb90e5c1d656 100644 (file)
--- a/crypto/bn/bn_prime.c
+++ b/crypto/bn/bn_prime.c
@@ -142,6 +142,8 @@ int BN_GENCB_call(BN_GENCB *cb, int a, int b)
                {
        case 1:
                /* Deprecated-style callbacks */
+               if(!cb->cb.cb_1)
+                       return 1;
                cb->cb.cb_1(a, b, cb->arg);
                return 1;
        case 2: