Remove nlerror in getCurrentWindowUnder (useless)

Add debug when lua error

nel/src/gui/lua_ihm.cpp

@@ -1123,7 +1123,6 @@ namespace NLGUI
 		if(!pIE)
 		{
 			ls.pushNil();
-			nlerror("getCurrentWindowUnder(): No UICaller found. return Nil");
 		}
 		else
 		{

nel/src/gui/lua_manager.cpp

@@ -70,7 +70,17 @@ namespace NLGUI
 		}
 		catch( const ELuaError &e )
 		{
+			#if !FINAL_VERSION
+			nlwarning("--- LUA ERROR ---");
 			nlwarning(e.luaWhat().c_str());
+			std::vector<std::string> res;
+			NLMISC::explode(luaScript, std::string("\n"), res);
+			for(uint k = 0; k < res.size(); ++k)
+			{
+				nlwarning("%.05u %s", k, res[k].c_str());
+			}
+			nlwarning("--- ********* ---");
+			#endif
 			return false;
 		}