Fix 7.1 break issues

diff --git a/SVUI_Chat/SVUI_Chat.lua b/SVUI_Chat/SVUI_Chat.lua
index 214935f..6c8638b 100644
--- a/SVUI_Chat/SVUI_Chat.lua
+++ b/SVUI_Chat/SVUI_Chat.lua
@@ -954,7 +954,8 @@ do
 	end

 	local _hook_OnHyperlinkLeave = function(self, refString)
-		if(not CHAT_HOVER_URL) then return; end
+		-- JV: 20161025 FIXME: (7.1) Lazyfix for Chat window reset causing this to fire with no refString. Longterm: figure out why!
+		if(not CHAT_HOVER_URL or not refString) then return; end
 		local token = refString:match("^([^:]+)")
 		if _linkTokens[token] then
 			HideUIPanel(GameTooltip)