libsmartcols: fix divide by zero [coverity]

Signed-off-by: Karel Zak <kzak@redhat.com>

diff --git a/libsmartcols/src/calculate.c b/libsmartcols/src/calculate.c
index 995e87191db3d28477e853049761a4cf83749427..ad0b15d92d5266d70a2bffce69186488a15c6b6d 100644 (file)
--- a/libsmartcols/src/calculate.c
+++ b/libsmartcols/src/calculate.c
@@ -119,7 +119,9 @@ static void count_column_deviation(struct libscols_table *tb, struct libscols_co
                n++;
                sum += ce->width + extra;
        }
-       st->width_avg = sum / n;
+
+       if (n)
+               st->width_avg = sum / n;
 
        /* count deviation */
        if (n > 1) {