Attempt at a proper fix for attachments/orphan prims being drawn when they shouldn't be (setRegion is already called further down the update chain. Removed a excess call that probably is breaking things.).

indra/newview/lldrawable.cpp

@@ -1029,7 +1029,7 @@ BOOL LLDrawable::isVisible() const
 		return TRUE;
 	}
 
-#if 1
+#if 0
 	//disabling this code fixes DEV-20105.  Leaving in place in case some other bug pops up as a a result.
 	//should be safe to just always ask the spatial group for visibility.
 	if (isActive())

indra/newview/llviewerobjectlist.cpp

@@ -488,7 +488,6 @@ void LLViewerObjectList::processObjectUpdate(LLMessageSystem *mesgsys,
 			
 			if (objectp->getRegion() != regionp)
 			{    // Object changed region, so update it
-				objectp->setRegion(regionp);
 				objectp->updateRegion(regionp); // for LLVOAvatar
 			}
 		}