[PATCH] fs: isofs: Fix bug in the way to check if the year is a leap year

[Oscar Forner Martinez <oscar.forner.martinez@gmail.com>]

The way to check if the year is a leap year was incomplete.
It was checking only if the year can be divided by 4, that is
necessary but not a sufficient condition. It has to check as well
if the year can not be divided by 100 or if the year can be
divided by 400.

Signed-off-by: Oscar Forner Martinez <oscar.forner.martinez@gmail.com>
---
 fs/isofs/util.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/isofs/util.c b/fs/isofs/util.c
index 01e1ee7..d2dd602 100644
--- a/fs/isofs/util.c
+++ b/fs/isofs/util.c
@@ -38,7 +38,7 @@ int iso_date(char * p, int flag)
 			days += (year+1) / 4;
 		for (i = 1; i < month; i++)
 			days += monlen[i-1];
-		if (((year+2) % 4) == 0 && month > 2)
+		if (((year+2) % 4) == 0 && month > 2 && ((((year+2) % 100) != 0) || (((year+2) % 400) == 0)))
 			days++;
 		days += day - 1;
 		crtime = ((((days * 24) + hour) * 60 + minute) * 60)
-- 
2.2.1