size_t: singleton change of variable type mid call stack

Test whether the Git CI system allows, or fails, when LLP64 systems
need variable type coercion from size_t back to unsigned long.

All the *nix systems should pass, but compile checks for LLP64 systems
may fail. This is a crucial information spike for Git files > 4Gb,
i.e. Issues: git-lfs git-for-windows#2434, GfW git-for-windows#2179, git-for-windows#1848, git-for-windows#3306.

Signed-off-by: Philip Oakley <philipoakley@iee.email>

builtin/unpack-objects.c

@@ -320,7 +320,7 @@ static void added_object(unsigned nr, enum object_type type,
 	}
 }
 
-static void unpack_non_delta_entry(enum object_type type, unsigned long size,
+static void unpack_non_delta_entry(enum object_type type, size_t size,
 				   unsigned nr)
 {
 	void *buf = get_data(size);