FreeBSD akode: Fix FTBFS on ptrdiff_t redefinition

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>

freebsd/dependencies/akode/files/patch-b04-fix-ftbfs-on-ptrdiff_t-redefinition.diff

@@ -0,0 +1,20 @@
+commit 6c3892f0e0939e0b40a9d46142a30005ecaab77f
+Author: Slávek Banko <slavek.banko@axis.cz>
+Date:   Fri May 26 09:59:08 2017 +0200
+
+    Fix FTBFS on ptrdiff_t redefinition
+    
+    Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
+
+diff --git a/akode/plugins/mpc_decoder/mppdec/synth_filter.cpp b/akode/plugins/mpc_decoder/mppdec/synth_filter.cpp
+index 256417a..2ea7a08 100644
+--- a/akode/plugins/mpc_decoder/mppdec/synth_filter.cpp
++++ b/akode/plugins/mpc_decoder/mppdec/synth_filter.cpp
+@@ -1,7 +1,5 @@
+ #include "stdafx.h"
+ 
+-typedef int ptrdiff_t;
+-
+ 
+ /* C O N S T A N T S */
+ #undef _