K 10
svn:author
V 6
pkubaj
K 8
svn:date
V 27
2019-09-11T12:42:53.350794Z
K 7
svn:log
V 333
chinese/pyzy: Fix build on powerpc64, aarch64 and armv*

Add explicit signed to char to fix build where char is unsigned.
./DoublePinyinTable.h:166:5: error: constant expression evaluates to -1 which cannot be narrowed to type 'char' [-Wc++11-narrowing]

PR:		240457
Approved by:	linimon (mentor), henry.hu.sh@gmail.com (maintainer)

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