Cache the lookup of the sim access level.

Being part of the state line, it is called every frame, causing a
translation lookup every frame.

indra/newview/llviewerregion.cpp

@@ -599,9 +599,15 @@ BOOL LLViewerRegion::canManageEstate() const
 		|| gAgent.getID() == getOwner();
 }
 
-const std::string LLViewerRegion::getSimAccessString() const
+std::string const& LLViewerRegion::getSimAccessString()
 {
-	return accessToString(mSimAccess);
+	// Singu: added a cache because this is called every frame.
+	if (mLastSimAccess != mSimAccess)
+	{
+		mSimAccessString = accessToString(mSimAccess);
+		mLastSimAccess = mSimAccess;
+	}
+	return mSimAccessString;
 }
 
 std::string LLViewerRegion::getLocalizedSimProductName() const