Fix html build.

diff --git a/Makefile b/Makefile
index a2b330967c1dd85513422f710db0ad4cb453f5bf..0f1d83654f3e528b1445167063c2c5840541b313 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -185,6 +185,9 @@ $(DVIDIR)/%.dvi: %.dvi
 %.eps: %.dia
        $(DIA) -t eps-builtin -e $@ $<
 
+%.png: %.dia
+       $(DIA) -e $@ $<
+
 %.pdf: %.eps
        $(EPSTOPDF) $<