Fix a printf format string signedness warning

gcc 13.2 outputs several warnings for mismatched printf format strings, such as:

/home/david/Development/julius/test/sav/sav_compare.c: In function ‘compare_part’:
/home/david/Development/julius/test/sav/sav_compare.c:522:45: warning: format ‘%X’ expects argument of type ‘unsigned int’, but argument 3 has type ‘int’ [-Wformat=]
  522 |                 printf("record %d offset 0x%X", i / save_game_parts[index].record_length, i % save_game_parts[index].record_length);
      |                                            ~^                                             ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
      |                                             |                                               |
      |                                             unsigned int                                    int
      |                                            %X

This patch doesn't fix all of them, but does fix the simple ones.

Signed-off-by: David Gow <david@ingeniumdigital.com>

src/platform/julius.c

@@ -244,11 +244,11 @@ static void handle_window_event(SDL_WindowEvent *event, int *window_active)
             break;
 
         case SDL_WINDOWEVENT_SHOWN:
-            SDL_Log("Window %d shown", (unsigned int) event->windowID);
+            SDL_Log("Window %u shown", (unsigned int) event->windowID);
             *window_active = 1;
             break;
         case SDL_WINDOWEVENT_HIDDEN:
-            SDL_Log("Window %d hidden", (unsigned int) event->windowID);
+            SDL_Log("Window %u hidden", (unsigned int) event->windowID);
             *window_active = 0;
             break;
     }