cygwin fix : use unsigned char for ctype function

See http://www.nabble.com/-PATCH-RFA--Distinguish-between-EOF-and-character-with-value-0xff-td23161772.html#a23188494

cygwin 1.7 actually displays a warning when using signed char with the ctype
function, so that compilation fails when using -Wall -Werror.

So we just cast all arguments to unsigned char.

Signed-off-by: Xavier Chantry <shiningxc@gmail.com>
Signed-off-by: Dan McGee <dan@archlinux.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/lib/libalpm/be_files.c b/lib/libalpm/be_files.c
index 21533ef2..51492d52 100644
--- a/lib/libalpm/be_files.c
+++ b/lib/libalpm/be_files.c
@@ -495,7 +495,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
 				}
 				_alpm_strtrim(line);
 
-				char first = tolower(line[0]);
+				char first = tolower((unsigned char)line[0]);
 				if(first > 'a' && first < 'z') {
 					struct tm tmp_tm = {0}; /* initialize to null in case of failure */
 					setlocale(LC_TIME, "C");
@@ -511,7 +511,7 @@ int _alpm_db_read(pmdb_t *db, pmpkg_t *info, pmdbinfrq_t inforeq)
 				}
 				_alpm_strtrim(line);
 
-				char first = tolower(line[0]);
+				char first = tolower((unsigned char)line[0]);
 				if(first > 'a' && first < 'z') {
 					struct tm tmp_tm = {0}; /* initialize to null in case of failure */
 					setlocale(LC_TIME, "C");