Make isoperator() take an int

...like other ctype functions. Should also fix a warning.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/bcal.c b/src/bcal.c
index 1ca5856..a4fd9a3 100644
--- a/src/bcal.c
+++ b/src/bcal.c
@@ -1612,7 +1612,7 @@ static int issign(char c)
 }
 
 /* Check if a char is operator or not */
-static int isoperator(char c)
+static int isoperator(int c)
 {
 	switch (c) {
 	case '+':