Issue #7788: Fix a crash produced by deleting a list slice with huge
step value.  Patch by Marcin Bachry.
diff --git a/Objects/bytearrayobject.c b/Objects/bytearrayobject.c
index 9d1ef99..87c6599 100644
--- a/Objects/bytearrayobject.c
+++ b/Objects/bytearrayobject.c
@@ -691,7 +691,8 @@
     else {
         if (needed == 0) {
             /* Delete slice */
-            Py_ssize_t cur, i;
+            size_t cur;
+            Py_ssize_t i;
 
             if (!_canresize(self))
                 return -1;