Fixes error, related to isleap variable's constantness, in anacron.

fix-const-isleap-error.diff

diff -ru anacron-2.3/gregor.c /tmp/anacron-2.3/gregor.c
--- anacron-2.3/gregor.c	2000-06-23 02:50:40.000000000 +0400
+++ /tmp/anacron-2.3/gregor.c	2012-04-13 11:23:24.000000000 +0400
@@ -65,7 +65,6 @@
 {
     int dn;
     int i;
-    const int isleap; /* save three calls to leap() */
 
     /* Some validity checks */
 
@@ -76,7 +75,8 @@
     if (month > 12 || month < 1) return - 1;
     if (day < 1) return - 1;
   
-    isleap = leap(year);
+    /* save three calls to leap() */
+    const int isleap = leap(year);
   
     if (month != 2) {
 	if(day > days_in_month[month - 1]) return - 1;