fdpgen dumpstat: rephrase an open coded 'hypot'

diff --git a/lib/fdpgen/tlayout.c b/lib/fdpgen/tlayout.c
index 86155b541cf322384144c32d6b57917a27f4a35d..ea5b847eab383960733e9378ff6b2e35238a7184 100644 (file)
--- a/lib/fdpgen/tlayout.c
+++ b/lib/fdpgen/tlayout.c
@@ -30,6 +30,7 @@
 #ifdef HAVE_SYS_TYPES_H
 #include <sys/types.h>
 #endif
+#include <math.h>
 #include <stdlib.h>
 #include <time.h>
 #ifndef _WIN32
@@ -645,7 +646,7 @@ void dumpstat(graph_t * g)
            dx = ND_pos(np)[0] - ND_pos(aghead(ep))[0];
            dy = ND_pos(np)[1] - ND_pos(aghead(ep))[1];
            fprintf(stderr, "  %s --  %s  (%f)\n", agnameof(np),
-                   agnameof(aghead(ep)), sqrt(dx * dx + dy * dy));
+                   agnameof(aghead(ep)), hypot(dx, dy));
        }
     }
 }