(ccl_driver) <CCL_End>: Decrement stack_idx only when it is greater

than 0.

1 files changed, 2 insertions, 1 deletions

diff --git a/src/ccl.c b/src/ccl.c
index 8e2ba81501e..4f0dfbfbdbc 100644
--- a/src/ccl.c
+++ b/src/ccl.c
@@ -1026,8 +1026,9 @@ ccl_driver (ccl, source, destination, src_bytes, dst_bytes, consumed)
           break;
 
         case CCL_End:           /* 0000000000000000000000XXXXX */
-          if (stack_idx-- > 0)
+          if (stack_idx > 0)
             {
+              stack_idx--;
               ccl_prog = ccl_prog_stack_struct[stack_idx].ccl_prog;
               ic = ccl_prog_stack_struct[stack_idx].ic;
               break;