user32/tests: Use %d to print last_bpp instead of %u.

dlls/user32/tests/sysparams.c

@@ -2475,7 +2475,7 @@ static void test_WM_DISPLAYCHANGE(void)
     todo_wine
     ok( res == WAIT_TIMEOUT || broken( !res ), "WaitForSingleObject returned %#lx\n", res );
     todo_wine
-    ok( last_bpp == -1 || broken( last_bpp == default_bpp ), "got WM_DISPLAYCHANGE bpp %u\n", last_bpp );
+    ok( last_bpp == -1 || broken( last_bpp == default_bpp ), "got WM_DISPLAYCHANGE bpp %d\n", last_bpp );
     displaychange_ok = FALSE;
 
     for (i = 0; i < ARRAY_SIZE(test_bpps); i++)
@@ -2496,7 +2496,7 @@ static void test_WM_DISPLAYCHANGE(void)
             /* Wait quite long for the message, screen setting changes can take some time */
             res = WaitForSingleObject( displaychange_sem, 10000 );
             ok( !res, "WaitForSingleObject returned %#lx\n", res );
-            ok( last_bpp == bpp, "got WM_DISPLAYCHANGE bpp %u\n", last_bpp );
+            ok( last_bpp == bpp, "got WM_DISPLAYCHANGE bpp %d\n", last_bpp );
         }
         else
         {
@@ -2504,7 +2504,7 @@ static void test_WM_DISPLAYCHANGE(void)
             win_skip( "ChangeDisplaySettingsExW returned %ld\n", res );
             ok( res == DISP_CHANGE_BADMODE || broken( DISP_CHANGE_FAILED && bpp == 8 ),
                 "ChangeDisplaySettingsExW returned %ld\n", res );
-            ok( last_bpp == -1, "got WM_DISPLAYCHANGE bpp %u\n", last_bpp );
+            ok( last_bpp == -1, "got WM_DISPLAYCHANGE bpp %d\n", last_bpp );
         }
         displaychange_ok = FALSE;
 
@@ -2525,7 +2525,7 @@ static void test_WM_DISPLAYCHANGE(void)
     todo_wine
     ok( res == WAIT_TIMEOUT || broken( !res ), "WaitForSingleObject returned %#lx\n", res );
     todo_wine
-    ok( last_bpp == -1 || broken( last_bpp == default_bpp ), "got WM_DISPLAYCHANGE bpp %u\n", last_bpp );
+    ok( last_bpp == -1 || broken( last_bpp == default_bpp ), "got WM_DISPLAYCHANGE bpp %d\n", last_bpp );
     displaychange_ok = FALSE;
 
     CloseHandle( displaychange_sem );