Pass explicit hs parameters into custom_extensions.c.

Change-Id: Id8543a88929091eb004a5205a30b483253cdaa25
Reviewed-on: https://boringssl-review.googlesource.com/12319
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
CQ-Verified: CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org>
diff --git a/ssl/t1_lib.c b/ssl/t1_lib.c
index a908a99..a87bee1 100644
--- a/ssl/t1_lib.c
+++ b/ssl/t1_lib.c
@@ -2775,7 +2775,7 @@
     }
   }
 
-  if (!custom_ext_add_clienthello(ssl, &extensions)) {
+  if (!custom_ext_add_clienthello(hs, &extensions)) {
     goto err;
   }
 
@@ -2864,7 +2864,7 @@
     }
   }
 
-  if (!custom_ext_add_serverhello(ssl, &extensions)) {
+  if (!custom_ext_add_serverhello(hs, &extensions)) {
     goto err;
   }
 
@@ -2918,7 +2918,7 @@
         tls_extension_find(&ext_index, type);
 
     if (ext == NULL) {
-      if (!custom_ext_parse_clienthello(ssl, out_alert, type, &extension)) {
+      if (!custom_ext_parse_clienthello(hs, out_alert, type, &extension)) {
         OPENSSL_PUT_ERROR(SSL, SSL_R_ERROR_PARSING_EXTENSION);
         return 0;
       }
@@ -3019,7 +3019,7 @@
         tls_extension_find(&ext_index, type);
 
     if (ext == NULL) {
-      if (!custom_ext_parse_serverhello(ssl, out_alert, type, &extension)) {
+      if (!custom_ext_parse_serverhello(hs, out_alert, type, &extension)) {
         return 0;
       }
       continue;