SDL: Update README-migration (26f27)

From 26f27a9e5a384cf14108e8c89f5c81e935a18829 Mon Sep 17 00:00:00 2001
From: Sylvain <[EMAIL REDACTED]>
Date: Thu, 9 Feb 2023 22:03:57 +0100
Subject: [PATCH] Update README-migration

---
 docs/README-migration.md | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/docs/README-migration.md b/docs/README-migration.md
index 989d245aa7f9..acb6ca9fc665 100644
--- a/docs/README-migration.md
+++ b/docs/README-migration.md
@@ -936,6 +936,8 @@ The following functions have been renamed:
 
 ## SDL_system.h
 
+SDL_AndroidGetExternalStorageState() takes the state as an output parameter and returns 0 if the function succeeds or a negative error code if there was an error.
+
 The following functions have been renamed:
 * SDL_RenderGetD3D11Device() => SDL_GetRenderD3D11Device()
 * SDL_RenderGetD3D9Device() => SDL_GetRenderD3D9Device()
@@ -973,6 +975,10 @@ If you were using this macro for other things besides SDL ticks values, you can
 #define SDL_TICKS_PASSED(A, B)  ((Sint32)((B) - (A)) <= 0)

+## SDL_touch.h
+
+SDL_GetNumTouchFingers() returns a negative error code if there was an error.
+

SDL_version.h

SDL_GetRevisionNumber() has been removed from the API, it always returned 0 in SDL 2.0.