SDL: Use SDL_iscntrl() call instead of manual code that is doing the same (#8593)

SDL Commits
1 
From 0413f6fc49848604c8c6cb719a6dd6c10849dc68 Mon Sep 17 00:00:00 2001
From: Dimitriy Ryazantcev <[EMAIL REDACTED]>
Date: Tue, 21 Nov 2023 18:36:32 +0200
Subject: [PATCH] Use SDL_iscntrl() call instead of manual code that is doing
 the same (#8593)

---
 src/events/SDL_keyboard.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/events/SDL_keyboard.c b/src/events/SDL_keyboard.c
index c8ddf125034a..2a92707d3411 100644
--- a/src/events/SDL_keyboard.c
+++ b/src/events/SDL_keyboard.c
@@ -1063,7 +1063,7 @@ int SDL_SendKeyboardText(const char *text)
     int posted;
 
     /* Don't post text events for unprintable characters */
-    if ((unsigned char)*text < ' ' || *text == 127) {
+    if (SDL_iscntrl((int)*text)) {
         return 0;
     }