sdl: don't needlessly kill the video and input subsystems before control configuration

src/drivers/sdl/input.cpp

@@ -764,14 +764,7 @@ ButtonConfigBegin()
 {
     SDL_Surface *screen;
  
-    // XXX soules - why are we doing this right before KillVideo()?
+    // activate the video subsystem if it is not already initialized
-    SDL_QuitSubSystem(SDL_INIT_VIDEO);
-
-    // shut down the video and joystick subsystems
-    bcpv=KillVideo();
-    bcpj=KillJoysticks();
- 
-    // reactivate the video subsystem
     if(!SDL_WasInit(SDL_INIT_VIDEO)) {
     	if(!bcpv) {
     		InitVideo(GameInfo);
@@ -801,10 +794,6 @@ ButtonConfigBegin()
         }
     }
  
-    // XXX soules - why did we shut this down?
-    // initialize the joystick subsystem
-    InitJoysticks();
- 
     return(1);
 }