MAINT-5232: Clean up some dubious LLSingleton methods.

Remove evil getIfExists() method, used by no one.
Remove evil destroyed() method, used in exactly three places -- one of which
is a test. Replace with equally evil instanceExists() method, which is used
EVERYWHERE -- sigh.

1 files changed, 1 insertions, 1 deletions

diff --git a/indra/llcommon/llregistry.h b/indra/llcommon/llregistry.h
index 29950c108d..fde729f8f9 100755
--- a/indra/llcommon/llregistry.h
+++ b/indra/llcommon/llregistry.h
@@ -269,7 +269,7 @@ public:
 
 		~ScopedRegistrar()
 		{
-			if (!singleton_t::destroyed())
+			if (singleton_t::instanceExists())
 			{
 				popScope();
 			}