FS#8871 by Tomasz Wasilczyk, avoid negative runtime estimation (that would later be cast to an unsigned giving huge values

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17080 a1c6a512-1295-4272-9138-f99709370657
diff --git a/docs/CREDITS b/docs/CREDITS
index 9b4a02a..4809483 100644
--- a/docs/CREDITS
+++ b/docs/CREDITS
@@ -386,6 +386,7 @@
 Christopher Williams
 Martin Ritter
 Justin Hannigan
+Tomasz Wasilczyk
 
 
 The libmad team