Check the return value from ASN1_INTEGER_set

Found by Coverity
Reviewed-by: NRichard Levitte <levitte@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/7169)

crypto/pkcs12/p12_init.c

@@ -22,7 +22,8 @@ PKCS12 *PKCS12_init(int mode)
         PKCS12err(PKCS12_F_PKCS12_INIT, ERR_R_MALLOC_FAILURE);
         return NULL;
     }
-    ASN1_INTEGER_set(pkcs12->version, 3);
+    if (!ASN1_INTEGER_set(pkcs12->version, 3))
+        goto err;
     pkcs12->authsafes->type = OBJ_nid2obj(mode);
     switch (mode) {
     case NID_pkcs7_data: