ssl_tls: Enable Suite B with subset of ECP curves

Make sure the code compiles even if some curves are not defined.

Fixes #1591
diff --git a/ChangeLog b/ChangeLog
index 8b9bfef..62e5a8c 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -47,6 +47,8 @@
    * Fix Visual Studio Release x64 build configuration by inheriting
      PlatformToolset from the project configuration. Fixes #1430 reported by
      irwir.
+   * Enable Suite B with subset of ECP curves. Make sure the code compiles even
+     if some curves are not defined. Fixes #1591 reported by dbedev.
 
 Changes
    * Return from various debugging routines immediately if the