Mono glue generates invalid code when casting negative number

[Atlinx]

Godot version

3.5.1, though it may also affect later versions

System information

Windows 11

Issue description

I'm building snopek games' sg_physics_2d module with godot 3.5, and this bit of C++ code

	// From sg_physics_2d_server.h
	RID collision_object_create(CollisionObjectType p_object_type, BodyType p_body_type = BODY_UNKNOWN);
	
	// From sg_physics_2d_server.cpp
	ClassDB::bind_method(D_METHOD("collision_object_create", "object_type", "body_type"), &SGPhysics2DServer::collision_object_create, DEFVAL(BODY_UNKNOWN));

gets converted into

        /// <summary>
        /// <para>Creates a collision object.</para>
        /// </summary>
        [GodotMethod("collision_object_create")]
        public static RID CollisionObjectCreate(SGPhysics2DServer.CollisionObjectType objectType, SGPhysics2DServer.BodyType bodyType = (SGPhysics2DServer.BodyType)-1)
        {
            return new RID(NativeCalls.godot_icall_2_881(method_bind_12, ptr, (int)objectType, (int)bodyType));
        }

Note that BODY_UNKNOWN is an enum value that evaluates to -1. Notice how there are no parentheses around the -1 in C# code, leading to a compiler error. Instead of (SGPhysics2DServer.BodyType)-1, it should be (SGPhysics2DServer.BodyType)(-1)

Steps to reproduce

N/A

Minimal reproduction project

See snopek games' sg-physics-2d repository