Add a missing cairo context restore()

It's not clear if this was causing any ill effects, but it is
certainly bad form.

* grapher/GraphWidget.cxx (on_expose_event): add missing cr->restore().

1 files changed, 1 insertions, 0 deletions

diff --git a/grapher/GraphWidget.cxx b/grapher/GraphWidget.cxx
index 739d9450..cfec0adf 100644
--- a/grapher/GraphWidget.cxx
+++ b/grapher/GraphWidget.cxx
@@ -126,6 +126,7 @@ namespace systemtap
       }
     if (_hoverText && _hoverText->isVisible())
       _hoverText->draw(cr);
+    cr->restore();
     return true;
   }