fix assumptions that char is signed

diff --git a/src/time/tzset.c b/src/time/tzset.c
index b96ea158c15dc1ac4da8080a7c0cbdf594eb631d..0cd47cf20707633b8cd7ed17ad2e612ce8d310a9 100644 (file)
--- a/src/time/tzset.c
+++ b/src/time/tzset.c
@@ -21,8 +21,8 @@ static char dst_name[TZNAME_MAX+1];
 
 /* all elements are zero-based */
 static struct rule {
-       char month;
-       char week;
+       signed char month;
+       signed char week;
        short day;
        int time;
 } __dst_start, __dst_end;