Call OnLibraryAdded for all available librarys (bug 5925)

When loading multiple plugins at once (on server start or mapchange)
OnLibraryAdded is only called for libraries which are loaded after the
current plugin. The plugin isn't informed about the libraries that were
added before its OnPluginStart forward was called.

This patch calls OnLibraryAdded for all already registered libraries the
current plugin has missed.

core/logic/PluginSys.cpp

@@ -427,6 +427,24 @@ APLRes CPlugin::Call_AskPluginLoad(char *error, size_t maxlength)
 	}
 }
 
+void CPlugin::Call_OnLibraryAdded(const char *lib)
+{
+	if (m_status > Plugin_Paused)
+	{
+		return;
+	}
+
+	cell_t result;
+	IPluginFunction *pFunction = m_pRuntime->GetFunctionByName("OnLibraryAdded");
+	if (!pFunction)
+	{
+		return;
+	}
+
+	pFunction->PushString(lib);
+	pFunction->Execute(&result);
+}
+
 void *CPlugin::GetPluginStructure()
 {
 	return NULL;
@@ -1402,6 +1420,22 @@ bool CPluginManager::RunSecondPass(CPlugin *pPlugin, char *error, size_t maxleng
 		OnLibraryAction((*s_iter).c_str(), LibraryAction_Added);
 	}
 
+	/* Go through all other already loaded plugins and tell this plugin, that their libraries are loaded */
+	List<CPlugin *>::iterator pl_iter;
+	CPlugin *pl;
+	for (pl_iter=m_plugins.begin(); pl_iter!=m_plugins.end(); pl_iter++)
+	{
+		pl = (*pl_iter);
+		/* Don't call our own libraries again and only care for already loaded plugins */
+		if(pl == pPlugin || pl->GetStatus() != Plugin_Running)
+			continue;
+
+		for (s_iter=pl->m_Libraries.begin(); s_iter!=pl->m_Libraries.end(); s_iter++)
+		{
+			pPlugin->Call_OnLibraryAdded((*s_iter).c_str());
+		}
+	}
+
 	/* :TODO: optimize? does this even matter? */
 	pPlugin->GetPhrases()->AddPhraseFile("core.phrases");
 

core/logic/PluginSys.h

@@ -204,6 +204,11 @@ public:
 	 */
 	void Call_OnAllPluginsLoaded();
 
+	/**
+	 * Calls the OnLibraryAdded function.
+	 */
+	void Call_OnLibraryAdded(const char *lib);
+
 	/**
 	 * Returns true if a plugin is usable.
 	 */