[Pspp-cvs] Changes to pspp/src/plot-hist.c

[John Darrington]

Index: pspp/src/plot-hist.c
diff -u pspp/src/plot-hist.c:1.2 pspp/src/plot-hist.c:1.3
--- pspp/src/plot-hist.c:1.2    Fri Jan 14 04:05:47 2005
+++ pspp/src/plot-hist.c        Wed Apr 13 10:09:59 2005
@@ -39,6 +39,9 @@
 histogram_write_legend(struct chart *ch, const struct normal_curve *norm)
 {
   char buf[100];
+  if ( !ch )
+         return ;
+
   pl_savestate_r(ch->lp);
 
   sprintf(buf,"N = %.2f",norm->N);
@@ -66,6 +69,8 @@
   double lower;
   double height;
 
+  if ( !ch ) 
+         return ;
   const size_t bins = gsl_histogram_bins(hist);
   const double x_pos = (ch->data_right - ch->data_left) * bar / (double) bins ;
   const double width = (ch->data_right - ch->data_left) / (double) bins ;