Bug #1629125: fix wrong data type (int -> Py_ssize_t) in PyDict_Next docs.
diff --git a/Doc/api/concrete.tex b/Doc/api/concrete.tex
index 33b04d4..e2d3e52 100644
--- a/Doc/api/concrete.tex
+++ b/Doc/api/concrete.tex
@@ -2082,7 +2082,7 @@
 
 \begin{verbatim}
 PyObject *key, *value;
-int pos = 0;
+Py_ssize_t pos = 0;
 
 while (PyDict_Next(self->dict, &pos, &key, &value)) {
     /* do something interesting with the values... */
@@ -2097,7 +2097,7 @@
 
 \begin{verbatim}
 PyObject *key, *value;
-int pos = 0;
+Py_ssize_t pos = 0;
 
 while (PyDict_Next(self->dict, &pos, &key, &value)) {
     int i = PyInt_AS_LONG(value) + 1;