From a7b2db05cd77c91268b377a810450dc4b5976473 Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Sun, 13 Oct 2013 19:48:45 -0700
Subject: [PATCH] Added an assert to catch init/quit call mismatch that might
 bite people.

---
 src/SDL.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/SDL.c b/src/SDL.c
index d8c05fb5b..b1111159a 100644
--- a/src/SDL.c
+++ b/src/SDL.c
@@ -65,6 +65,8 @@ static void
 SDL_PrivateSubsystemRefCountDecr(Uint32 subsystem)
 {
     int subsystem_index = SDL_MostSignificantBitIndex32(subsystem);
+    /* If this assert triggers there is a mismatch between init and quit calls */
+    SDL_assert(SDL_SubsystemRefCount[subsystem_index] > 0);
     if (SDL_SubsystemRefCount[subsystem_index] > 0) {
         --SDL_SubsystemRefCount[subsystem_index];
     }