gv2gxl initState: squash a -Wconversion warning

diff --git a/cmd/tools/gv2gxl.c b/cmd/tools/gv2gxl.c
index 862132d2c60b1d9a482031fbb473f84a42a107da..c19b6c80762c13bbc79cd9249dd56c6a777814fc 100644 (file)
--- a/cmd/tools/gv2gxl.c
+++ b/cmd/tools/gv2gxl.c
@@ -893,7 +893,7 @@ static gxlstate_t *initState(Agraph_t * g)
     stp->idList = dtopen(&idDisc, Dtoset);
     stp->attrsNotWritten = 0;
     stp->root = g;
-    stp->directed = agisdirected(g);
+    stp->directed = agisdirected(g) != 0;
     return stp;
 }