Added ECMULT window size

Author: elichai

.gitignore

@@ -4,3 +4,6 @@ Cargo.lock
 #IntelliJ project files
 .idea
 *.iml
+
+CMakeLists.txt
+cmake-build-debug

build.rs

@@ -53,7 +53,8 @@ fn main() {
                .define("USE_FIELD_INV_BUILTIN", Some("1"))
                .define("USE_SCALAR_INV_BUILTIN", Some("1"))
                .define("USE_ENDOMORPHISM", Some("1"))
-               .define("ENABLE_MODULE_ECDH", Some("1"));
+               .define("ENABLE_MODULE_ECDH", Some("1"))
+               .define("ECMULT_WINDOW_SIZE", Some("15")); // This is the default in the configure file (`auto`)
 
     #[cfg(feature = "recovery")]
     base_config.define("ENABLE_MODULE_RECOVERY", Some("1"));