SDL: Add the pixel density to the display mode list in testwm

SDL Commits
1 
From d1ee44b65e5f41b0dc1548aa88cfc1ff658ab068 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <[EMAIL REDACTED]>
Date: Thu, 18 May 2023 07:34:16 -0700
Subject: [PATCH] Add the pixel density to the display mode list in testwm

---
 test/testwm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/test/testwm.c b/test/testwm.c
index b7b075911ea0..4e4057ec3e5d 100644
--- a/test/testwm.c
+++ b/test/testwm.c
@@ -112,9 +112,9 @@ draw_modes_menu(SDL_Window *window, SDL_Renderer *renderer, SDL_FRect viewport)
                 SDL_FRect cell_rect;
                 const SDL_DisplayMode *mode = modes[j];
 
-                (void)SDL_snprintf(text, sizeof(text), "%s mode %d: %dx%d@%gHz",
+                (void)SDL_snprintf(text, sizeof(text), "%s mode %d: %dx%d@%gx %gHz",
                                    SDL_GetDisplayName(display_id),
-                                   j, mode->w, mode->h, mode->refresh_rate);
+                                   j, mode->w, mode->h, mode->pixel_density, mode->refresh_rate);
 
                 /* Update column width */
                 text_length = (int)SDL_strlen(text);