[librsvg] filter: Plug one more cairo context/surface leak

[Carlos Garnacho <carlosg src gnome org>]

commit e9fa71c521908cb0f4a9257d0cba19e6e24a6616
Author: Carlos Garnacho <carlosg gnome org>
Date:   Tue Aug 4 11:30:11 2015 +0200

    filter: Plug one more cairo context/surface leak
    
    https://bugzilla.gnome.org/show_bug.cgi?id=748608

 rsvg-filter.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/rsvg-filter.c b/rsvg-filter.c
index 61af650..7035464 100644
--- a/rsvg-filter.c
+++ b/rsvg-filter.c
@@ -1752,6 +1752,7 @@ gaussian_blur_surface (cairo_surface_t *in,
         cr = cairo_create (out);
         cairo_set_source_surface (cr, in, 0, 0);
         cairo_paint (cr);
+        cairo_destroy (cr);
         return;
     }