[Debian-med-packaging] Bug#865060: bcftools: Fix for the test-regidx FTBFS

[Adrian Bunk]

Control: tags -1 patch

The attached patch fixes test-regidx on architectures where char
is unsigned.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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