add missing set of parentheses

git-svn-id: svn://svn.savannah.gnu.org/nano/trunk/nano@1563 35c25a1d-7b9e-4130-9fde-d3aeb78583b8

diff --git a/src/winio.c b/src/winio.c
index bff6ebae1dad35b2920aa385b7845797bb2092a2..d474769112a4dcb759a36761eebc4bf9a1ff8ce8 100644 (file)
--- a/src/winio.c
+++ b/src/winio.c
@@ -352,7 +352,7 @@ size_t actual_x(const char *str, size_t xplus)
 
     for (; length < xplus && *str != '\0'; i++, str++) {
        if (*str == '\t')
-           length += tabsize - length % tabsize;
+           length += tabsize - (length % tabsize);
        else if (is_cntrl_char((int)*str))
            length += 2;
        else