Implementing lineheight

[Andrej Lojdl]

I manage to compile my code. But it's acting like it does not read new value 

of lineheight from terminal. Example: It's set to 1 by default. When you type 

title("line1\nline2","lineheight",2);  

output plot don't change. Am I missing something important here?

Here is diff http://pastebin.com/tmApPG0U 

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Andrej