Description: Fix FTBFS on architectures where char is unsigned
Author: Adrian Bunk <bunk@debian.org>
Bug-Debian: https://bugs.debian.org/919172

--- ball-1.5.0+git20180813.37fc53c.orig/include/BALL/DATATYPE/hashGrid.h
+++ ball-1.5.0+git20180813.37fc53c/include/BALL/DATATYPE/hashGrid.h
@@ -32,7 +32,7 @@ namespace BALL
 {
 	namespace __private
 	{
-		extern const char BALL_EXPORT neighbour_table_[27][3];
+		extern const signed char BALL_EXPORT neighbour_table_[27][3];
 	}
 
 	template <typename Item> class HashGrid3;
--- ball-1.5.0+git20180813.37fc53c.orig/source/DATATYPE/hashGrid.C
+++ ball-1.5.0+git20180813.37fc53c/source/DATATYPE/hashGrid.C
@@ -9,7 +9,7 @@ namespace BALL
 {
 	namespace __private
 	{
-		const char neighbour_table_[27][3] =
+		const signed char neighbour_table_[27][3] =
 		{
 			{ 0,  0,  0 }, { 0,  0, -1 }, { 0,  0,  1 },
 			{ 0, -1, -1 }, { 0, -1,  0 }, { 0, -1,  1 },