use correct base ptr

diff --git a/Objects/unicodeobject.c b/Objects/unicodeobject.c
index 95ecfe2ae090f49990149ba057135d1df442bbf6..27492c80ba489b5f0836d361246b880807b34f2c 100644 (file)
--- a/Objects/unicodeobject.c
+++ b/Objects/unicodeobject.c
@@ -1975,8 +1975,9 @@ _PyUnicode_FindMaxChar(PyObject *unicode, Py_ssize_t start, Py_ssize_t end)
         return 127;
 
     kind = PyUnicode_KIND(unicode);
-    startptr = PyUnicode_DATA(unicode) + start * kind;
+    startptr = PyUnicode_DATA(unicode);
     endptr = startptr + end * kind;
+    startptr += start * kind;
     switch(kind) {
     case PyUnicode_1BYTE_KIND:
         return ucs1lib_find_max_char(startptr, endptr);