1 files changed, 10 insertions, 4 deletions

diff --git a/src/lib/libcrypto/stack/stack.c b/src/lib/libcrypto/stack/stack.c
index 2496f28a8c..c7173eb6ab 100644
--- a/src/lib/libcrypto/stack/stack.c
+++ b/src/lib/libcrypto/stack/stack.c
@@ -191,8 +191,7 @@ char *sk_delete(STACK *st, int loc)
         char *ret;
         int i,j;
 
-        if ((st == NULL) || (st->num == 0) || (loc < 0)
-                                         || (loc >= st->num)) return(NULL);
+        if(!st || (loc < 0) || (loc >= st->num)) return NULL;
 
         ret=st->data[loc];
         if (loc != st->num-1)
@@ -306,13 +305,13 @@ int sk_num(const STACK *st)
 
 char *sk_value(const STACK *st, int i)
 {
-        if(st == NULL) return NULL;
+        if(!st || (i < 0) || (i >= st->num)) return NULL;
         return st->data[i];
 }
 
 char *sk_set(STACK *st, int i, char *value)
 {
-        if(st == NULL) return NULL;
+        if(!st || (i < 0) || (i >= st->num)) return NULL;
         return (st->data[i] = value);
 }
 
@@ -332,3 +331,10 @@ void sk_sort(STACK *st)
                 st->sorted=1;
                 }
         }
+
+int sk_is_sorted(const STACK *st)
+        {
+        if (!st)
+                return 1;
+        return st->sorted;
+        }