The "disable_loading_patch" does not work under SDLMame - Because there is no code for it.
I have added the SDL code for the disable_loading_patch and it now operates correctly for SDL.
No other changes have been made to the way Hi Score patch operates.

Note: New sections are labeled OzFalcon for easy identification, They are duplicates of MKChamps code
modified for SDL by me and no credit is meant to be assumed by the labeling.

Changes:
/src/osd/sdl/video.c  --> Added update_hi
/src/osd/sdl/window.c  --> Added sdlwindow_video_window_update_hi
/src/osd/sdl/window.h  --> Declare sdlwindow_video_window_update_hi
/src/osd/sdl/osdsdl.h  --> Declare update_hi

Just to clarify, The SDL code has been included in this patch.
It is a complete Hi Score patch for both Windows and SDL Mame.

