Merge with MariaDB 5.1

1 files changed, 3 insertions, 2 deletions

diff --git a/sql-common/my_time.c b/sql-common/my_time.c
index 0408ea1e11f..03a124a341a 100644
--- a/sql-common/my_time.c
+++ b/sql-common/my_time.c
@@ -775,7 +775,7 @@ long calc_daynr(uint year,uint month,uint day)
   int y= year;                                  /* may be < 0 temporarily */
   DBUG_ENTER("calc_daynr");
 
-  if (y == 0 && month == 0 && day == 0)
+  if (y == 0 && month == 0)
     DBUG_RETURN(0);				/* Skip errors */
   /* Cast to int to be able to handle month == 0 */
   delsum= (long) (365 * y + 31 *((int) month - 1) + (int) day);
@@ -786,6 +786,7 @@ long calc_daynr(uint year,uint month,uint day)
   temp=(int) ((y/100+1)*3)/4;
   DBUG_PRINT("exit",("year: %d  month: %d  day: %d -> daynr: %ld",
 		     y+(month <= 2),month,day,delsum+y/4-temp));
+  DBUG_ASSERT(delsum+(int) y/4-temp > 0);
   DBUG_RETURN(delsum+(int) y/4-temp);
 } /* calc_daynr */
 
@@ -995,7 +996,7 @@ my_system_gmt_sec(const MYSQL_TIME *t_src, long *my_timezone,
     with unsigned time_t tmp+= shift*86400L might result in a number,
     larger then TIMESTAMP_MAX_VALUE, so another check will work.
   */
-  if ((tmp < TIMESTAMP_MIN_VALUE) || (tmp > TIMESTAMP_MAX_VALUE))
+  if (!IS_TIME_T_VALID_FOR_TIMESTAMP(tmp))
     tmp= 0;
 
   return (my_time_t) tmp;