Prevent out of array index

diff --git a/src/sp_lev.c b/src/sp_lev.c
index 11d6925014ba20004ed4911bb58ade537bfc5de6..488a04d87d47e55bb6b92075367dee678d6cc3c7 100644 (file)
--- a/src/sp_lev.c
+++ b/src/sp_lev.c
@@ -3912,9 +3912,9 @@ int n;
     xchar xx = (xchar) x, yy = (xchar) y;
 
     while (n > 0) {
+        --n;
         if (xs[n] == xx && ys[n] == yy)
             return TRUE;
-        --n;
     }
     return FALSE;
 }