More precise PI.

diff --git a/psp.c b/psp.c
index b616f734461b6518c1dfb27ac9436df3b9782753..1d94ebce3b1cbf620ab05eda07836bcd58621f7e 100644 (file)
--- a/psp.c
+++ b/psp.c
@@ -25,7 +25,7 @@
 #include <math.h>  /* for M_PI */
 
 #ifndef M_PI
-#  define M_PI 3.141592653589
+#  define M_PI 3.14159265358979323846
 #endif
 
 #define MYNAME "PSP"