cYTFeedParser: add signal OnLoadVideoInfo

Required for visualized progress display.


Origin commit data
------------------
Commit: 0aa261d911
Author: Thilo Graf <dbt@novatux.de>
Date: 2017-02-13 (Mon, 13 Feb 2017)

src/system/ytparser.cpp

@@ -323,6 +323,7 @@ bool cYTFeedParser::parseFeedJSON(std::string &answer)
 	Json::Value elements = root["items"];
 	for(unsigned int i=0; i<elements.size();++i)
 	{
+		OnLoadVideoInfo(i, elements.size(), g_Locale->getText(LOCALE_MOVIEBROWSER_SCAN_FOR_MOVIES));
 #ifdef DEBUG_PARSER
 		printf("=========================================================\n");
 		printf("Element %d in elements\n", i);