char on ARM is unsigned by default

audiofile-0.3.6-narrowing.patch

@@ -1,7 +1,12 @@
-diff -Nurb --strip-trailing-cr audiofile-0.3.6-orig/test/NeXT.cpp audiofile-0.3.6/test/NeXT.cpp
+diff -Nur audiofile-0.3.6-orig/test/NeXT.cpp audiofile-0.3.6/test/NeXT.cpp
 --- audiofile-0.3.6-orig/test/NeXT.cpp	2013-02-11 18:23:26.000000000 +0100
-+++ audiofile-0.3.6/test/NeXT.cpp	2016-02-03 21:49:10.867094322 +0100
-@@ -41,9 +41,9 @@
++++ audiofile-0.3.6/test/NeXT.cpp	2016-02-04 10:37:32.457140823 +0100
+@@ -37,13 +37,13 @@
+ 
+ #include "TestUtilities.h"
+ 
+-const char kDataUnspecifiedLength[] =
++const signed char kDataUnspecifiedLength[] =
  {
  	'.', 's', 'n', 'd',
  	0, 0, 0, 24, // offset of 24 bytes
@@ -13,7 +18,14 @@ diff -Nurb --strip-trailing-cr audiofile-0.3.6-orig/test/NeXT.cpp audiofile-0.3.
  	0, 0, 0, 1, // 1 channel
  	0, 1,
  	0, 1,
-@@ -63,7 +63,7 @@
+@@ -57,13 +57,13 @@
+ 	0, 55
+ };
+ 
+-const char kDataTruncated[] =
++const signed char kDataTruncated[] =
+ {
+ 	'.', 's', 'n', 'd',
  	0, 0, 0, 24, // offset of 24 bytes
  	0, 0, 0, 20, // length of 20 bytes
  	0, 0, 0, 3, // 16-bit linear
@@ -22,7 +34,14 @@ diff -Nurb --strip-trailing-cr audiofile-0.3.6-orig/test/NeXT.cpp audiofile-0.3.
  	0, 0, 0, 1, // 1 channel
  	0, 1,
  	0, 1,
-@@ -158,7 +158,7 @@
+@@ -152,13 +152,13 @@
+ 	ASSERT_EQ(::unlink(testFileName.c_str()), 0);
+ }
+ 
+-const char kDataZeroChannels[] =
++const signed char kDataZeroChannels[] =
+ {
+ 	'.', 's', 'n', 'd',
  	0, 0, 0, 24, // offset of 24 bytes
  	0, 0, 0, 2, // 2 bytes
  	0, 0, 0, 3, // 16-bit linear