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-rw-r--r--plugingui/painter.cc5
1 files changed, 4 insertions, 1 deletions
diff --git a/plugingui/painter.cc b/plugingui/painter.cc
index 3c290f3..3e6fa48 100644
--- a/plugingui/painter.cc
+++ b/plugingui/painter.cc
@@ -54,7 +54,10 @@ void Painter::setColour(const Colour& colour)
static void plot(PixelBufferAlpha& pixbuf, const Colour& colour,
int x, int y, double c)
{
- if((x >= (int)pixbuf.width) || (y >= (int)pixbuf.height))
+ if((x >= (int)pixbuf.width) ||
+ (y >= (int)pixbuf.height) ||
+ (x < 0) ||
+ (y < 0))
{
return;
}