gfx.c slow change to new powerup gfx engine

src/gfx.c

@@ -959,6 +959,8 @@ gfx_free_tileset ()
         SDL_FreeSurface (gfx.bomb.image);
     if (gfx.fire.image != NULL)
         SDL_FreeSurface (gfx.fire.image);
+    if (gfx.powerup.image != NULL)
+        SDL_FreeSurface (gfx.powerup.image);
     gfx.bomb.image = NULL;
     gfx.fire.image = NULL;
 };

src/gfx.h

@@ -46,6 +46,7 @@ struct __gfx {
 	short int postab[256];  // table of points where we need to go to.
 	
 	_gfxani field[FT_max];  // the field animations
+	_gfxani powerup;	// powerup field animation
 	_gfxani fire;       // fire (explostion)
 	_gfxani bomb;		// bomb animation
 	_gfxani ill;		// sick animation above the player