windows: Change the default on SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING.

It's easier for Visual Studio users that want this information to turn it on
or live without it, than it is to explain why every debugger that isn't Visual
Studio crashes out here. Eventually SetThreadDescription() will be the thing
everyone uses anyhow.

Fixes Bugzilla #3645.
(and several others).

src/thread/windows/SDL_systhread.c

@@ -199,7 +199,7 @@ SDL_SYS_SetupThread(const char *name)
             THREADNAME_INFO inf;
 
             /* C# and friends will try to catch this Exception, let's avoid it. */
-            if (SDL_GetHintBoolean(SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING, SDL_FALSE)) {
+            if (SDL_GetHintBoolean(SDL_HINT_WINDOWS_DISABLE_THREAD_NAMING, SDL_TRUE)) {
                 return;
             }