Updating prototypes for sasl_malloc_t/sasl_calloc_t/.. to use size_t

[Alexey Melnikov <alexey.melnikov@xxxxxxxxx>]

I would like to update prototypes for sasl_malloc_t and friends in 
sasl.h to use size_t. Current prototypes are invalid, in particular on 
64 bit Windows. Any concerns about this change?

diff --git a/include/sasl.h b/include/sasl.h
index 5bbbbfb..2ac5300 100755
--- a/include/sasl.h
+++ b/include/sasl.h
@@ -225,9 +225,9 @@ extern "C" {

 /* memory allocation functions which may optionally be replaced:
  */
-typedef void *sasl_malloc_t(unsigned long);
-typedef void *sasl_calloc_t(unsigned long, unsigned long);
-typedef void *sasl_realloc_t(void *, unsigned long);
+typedef void *sasl_malloc_t(size_t);
+typedef void *sasl_calloc_t(size_t, size_t);
+typedef void *sasl_realloc_t(void *, size_t);
 typedef void sasl_free_t(void *);

 LIBSASL_API void sasl_set_alloc(sasl_malloc_t *,