X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Fbox-whisker.c;h=57930c86e9e3d739baa9273ee994d63fe77b579f;hb=f1696fab032a5ae5c44e3a3dedba343fce9ffd5c;hp=773de80984d4405d74d6af6f4b661f5631a7d633;hpb=20fd432b34d65999f06fabfa8e9c3f5efbac41bd;p=pspp

diff --git a/src/box-whisker.c b/src/box-whisker.c
index 773de80984..57930c86e9 100644
--- a/src/box-whisker.c
+++ b/src/box-whisker.c
@@ -212,6 +212,9 @@ boxplot_draw_yscale(struct chart *ch , double y_max, double y_min)
   double y_tick;
   double d;
 
+  if ( !ch ) 
+     return ;
+
   ch->y_max  = y_max;
   ch->y_min  = y_min;