SDL: linux: Fix ibus support on Wayland/XWayland

SDL Commits
1 
From 5ceb674426acac7b597707c42d99f35e3a2a1897 Mon Sep 17 00:00:00 2001
From: Ethan Lee <[EMAIL REDACTED]>
Date: Sun, 28 Mar 2021 14:58:41 -0400
Subject: [PATCH] linux: Fix ibus support on Wayland/XWayland

---
 src/core/linux/SDL_ibus.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/core/linux/SDL_ibus.c b/src/core/linux/SDL_ibus.c
index 034ba632c..256926d83 100644
--- a/src/core/linux/SDL_ibus.c
+++ b/src/core/linux/SDL_ibus.c
@@ -257,7 +257,12 @@ IBus_GetDBusAddressFilename(void)
     }
     
     if (!*host) {
-        host = "unix";
+        const char *session = SDL_getenv("XDG_SESSION_TYPE");
+        if (session != NULL && SDL_strcmp(session, "wayland") == 0) {
+            host = "unix-wayland";
+        } else {
+            host = "unix";
+        }
     }
         
     SDL_memset(config_dir, 0, sizeof(config_dir));