packbuilder: size_t all the things

After 1cd6599, we were passing a pointer to an `unsigned long` to
a function that now expected a pointer to a `size_t`.  These types
differ on 64-bit Windows, which means that we trash the stack.

Use `size_t`s in the packbuilder to avoid this.

Author: Edward Thomson

CHANGELOG.md

@@ -51,6 +51,13 @@ v0.24 + 1
 
 ### Breaking API changes
 
+* `git_packbuilder_object_count` and `git_packbuilder_written` now
+  return a `size_t` instead of a `uint32_t` for more thorough
+  compatibility with the rest of the library.
+
+* `git_packbuiler_progress` now provides explicitly sized `uint32_t`
+  values instead of `unsigned int`.
+
 v0.24
 -------
 

include/git2/pack.h

@@ -196,21 +196,21 @@ GIT_EXTERN(int) git_packbuilder_foreach(git_packbuilder *pb, git_packbuilder_for
  * @param pb the packbuilder
  * @return the number of objects in the packfile
  */
-GIT_EXTERN(uint32_t) git_packbuilder_object_count(git_packbuilder *pb);
+GIT_EXTERN(size_t) git_packbuilder_object_count(git_packbuilder *pb);
 
 /**
  * Get the number of objects the packbuilder has already written out
  *
  * @param pb the packbuilder
  * @return the number of objects which have already been written
  */
-GIT_EXTERN(uint32_t) git_packbuilder_written(git_packbuilder *pb);
+GIT_EXTERN(size_t) git_packbuilder_written(git_packbuilder *pb);
 
 /** Packbuilder progress notification function */
 typedef int (*git_packbuilder_progress)(
 	int stage,
-	unsigned int current,
-	unsigned int total,
+	uint32_t current,
+	uint32_t total,
 	void *payload);
 
 /**