Help runtime fixed

[purlow]

If you try to access a help topic in the "library objects" or "daemon objects" indices that doesn't exist a runtime error will occur. This is due to GetTopic() returning zero and then trying to call GetHelp() on it. The problem is at line 323 and 383.

code:

topic = GetTopic(index, topic);
if(catch(help = topic->GetHelp(topic)) ) {
    Error = "An error occurred in attempting to access help.";
    return 0;
}

should be:

code:

topic = GetTopic(index, topic);
if( topic == 0 || catch(help = topic->GetHelp(topic)) ) {
    Error = "An error occurred in attempting to access help.";
    return 0;
}

--Purlow