Accept FS#6662. Thanks to Nick Vanderweit. No need to define PI as 
it is already defined as 
M_PI in 
math.h.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12355 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 8820a45..e6f1073 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -275,3 +275,5 @@
 Ben Keroack
 Sean Morrisey
 Shay Green
+Nick Vanderweit
+