Fix SSL_CTX_get_{min,max}_proto_version integer conversion warning

When using the SSL_CTX_get_min_min_version macro while compiling with
-Wall, my compiler rightfully complains about this construction:

warning: passing argument 3 of ‘SSL_CTX_ctrl’ makes integer from
pointer without a cast [-Wint-conversion]

These macro's should use 0, instead of NULL, for the third argument,
like most other SSL_CTX_ctrl 'get' wrappers do.

CLA: trivial
Signed-off-by: Steffan Karger <steffan.karger@fox-it.com>
Reviewed-by: Matt Caswell <matt@openssl.org>
Reviewed-by: Kurt Roeckx <kurt@roeckx.be>
Reviewed-by: Ben Kaduk <kaduk@mit.edu>
(Merged from https://github.com/openssl/openssl/pull/5099)

diff --git a/include/openssl/ssl.h b/include/openssl/ssl.h
index cfb069695bacd46de729af28dc8b2af6275fa540..b044015977d8ac485b24a9994d178e6505381391 100644 (file)
--- a/include/openssl/ssl.h
+++ b/include/openssl/ssl.h
@@ -1406,9 +1406,9 @@ DECLARE_PEM_rw(SSL_SESSION, SSL_SESSION)
 #define SSL_CTX_set_max_proto_version(ctx, version) \
         SSL_CTX_ctrl(ctx, SSL_CTRL_SET_MAX_PROTO_VERSION, version, NULL)
 #define SSL_CTX_get_min_proto_version(ctx) \
-        SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MIN_PROTO_VERSION, NULL, NULL)
+        SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MIN_PROTO_VERSION, 0, NULL)
 #define SSL_CTX_get_max_proto_version(ctx) \
-        SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MAX_PROTO_VERSION, NULL, NULL)
+        SSL_CTX_ctrl(ctx, SSL_CTRL_GET_MAX_PROTO_VERSION, 0, NULL)
 #define SSL_set_min_proto_version(s, version) \
         SSL_ctrl(s, SSL_CTRL_SET_MIN_PROTO_VERSION, version, NULL)
 #define SSL_set_max_proto_version(s, version) \