SDL_mixer: update xmp.h under MSVC project externals (missed in previous commit.)

From f18b72302d19625ff8eddd0400ae6f94539153b7 Mon Sep 17 00:00:00 2001
From: Ozkan Sezer <[EMAIL REDACTED]>
Date: Sun, 26 Jul 2026 22:55:20 +0300
Subject: [PATCH] update xmp.h under MSVC project externals (missed in previous
 commit.)

(cherry picked from commit fc16fc8e87cf9d9374f8f1ccb73e8bf144d2470e)
---
 VisualC/external/include/xmp.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/VisualC/external/include/xmp.h b/VisualC/external/include/xmp.h
index 27f27917..3c6c10de 100644
--- a/VisualC/external/include/xmp.h
+++ b/VisualC/external/include/xmp.h
@@ -9,11 +9,11 @@
 extern "C" {
 #endif
 
-#define XMP_VERSION "4.7.1"
-#define XMP_VERCODE 0x040701
+#define XMP_VERSION "4.7.2"
+#define XMP_VERCODE 0x040702
 #define XMP_VER_MAJOR 4
 #define XMP_VER_MINOR 7
-#define XMP_VER_RELEASE 1
+#define XMP_VER_RELEASE 2
 
 #if defined(_WIN32) && !defined(__CYGWIN__)
 # if defined(LIBXMP_STATIC)