[gtkextra] Memory leak when painting canvas after set_size

[Juan A. A. <jua...@gm...>]

Hi,

I don't know if there is any gtkextra developer suscribed to this
list, but I'll post this just in case.

I've observed that a lot of memory resources get used bi the Xorg
process when repeatedly calling gtk_plot_canvas_set_size() and
gtk_plot_canvas_paint() after.

I've discovered this issue because I made a mistake in my application.
But anyway, I think its worth bringing it up. Unfortunately I don't
have the knowledge nor the time right know to correct the problem.

I Hope someone can continue the developing of this great library.

Desde C=F3rdoba - Argentina, Gracias Adrian!

Suerte,

Juan