Add missing method for javascript

platform/javascript/os_javascript.cpp

@@ -782,6 +782,9 @@ void OS_JavaScript::set_cursor_shape(CursorShape p_shape) {
 		set_css_cursor(godot2dom_cursor(cursor_shape));
 }
 
+void OS_JavaScript::set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot) {
+}
+
 void OS_JavaScript::main_loop_begin() {
 
 	if (main_loop)

platform/javascript/os_javascript.h

@@ -128,6 +128,7 @@ public:
 	virtual bool is_userfs_persistent() const;
 
 	virtual void set_cursor_shape(CursorShape p_shape);
+	virtual void set_custom_mouse_cursor(const RES &p_cursor, CursorShape p_shape, const Vector2 &p_hotspot);
 
 	void main_loop_begin();
 	bool main_loop_iterate();