pacsort, introduce define for escape_char error code

The signedness of char is implementation defined. On systems where
char is unsigned, comparing a variable of type char with -1 is never
true, due to integer promotion rules. To avoid this, introduce a
define for invalid field separators where -1 is cast to char. This will
ensure that the return value check works for both unsigned and signed char.

Fixes one warning [-Wtype-limits] for comparissons with -1 when compiling
with -funsigned-char.

Signed-off-by: Rikard Falkeborn <rikard.falkeborn@gmail.com>
Signed-off-by: Allan McRae <allan@archlinux.org>

0 files changed, 0 insertions, 0 deletions