Bug#871248: ovito FTBFS on architectures where char is unsigned

[Adrian Bunk]

Source: ovito
Version: 2.9.0+dfsg1-1
Severity: serious

https://buildd.debian.org/status/package.php?p=ovito&suite=sid

...
In file included from /<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubes.cpp:24:0:
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:301:1: error: narrowing conversion of '-1' from 'int' to 'char' inside { } [-Wnarrowing]
 };
 ^
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:301:1: error: narrowing conversion of '-1' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-6' from 'int' to 'char' inside { } [-Wnarrowing]
 };
 ^
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-6' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-3' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-4' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-3' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-2' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-2' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-1' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-5' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-4' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-1' from 'int' to 'char' inside { } [-Wnarrowing]
/<<BUILDDIR>>/ovito-2.9.0+dfsg1/src/plugins/particles/modifier/fields/MarchingCubesLookupTable.h:416:1: error: narrowing conversion of '-5' from 'int' to 'char' inside { } [-Wnarrowing]
...