Unify unsigned integer usage in the API

Replace all occurences of unsigned int and unsigned long with size_t.

This is a backwards incompatible change, as the signature of many API
functions changes.

1 files changed, 1 insertions, 1 deletions

diff --git a/doc/tutorial.rst b/doc/tutorial.rst
index aaeb554..caa11c2 100644
--- a/doc/tutorial.rst
+++ b/doc/tutorial.rst
@@ -118,7 +118,7 @@ first newline in the commit message::
 The main function follows. In the beginning, we first declare a bunch
 of variables and check the command line parameters::
 
-    unsigned int i;
+    size_t i;
     char *text;
     char url[URL_SIZE];