[gtk+] Fix gccism - pointer arithmetic with void pointers

[Hans Breuer <hans src gnome org>]

commit fcdeab5456c7774edf79c8c26658a8fd5174c03d
Author: Hans Breuer <hans breuer org>
Date:   Sun Jul 12 18:00:40 2009 +0200

    Fix gccism - pointer arithmetic with void pointers

 gtk/gtkmountoperation.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/gtk/gtkmountoperation.c b/gtk/gtkmountoperation.c
index 318e4ae..6137388 100644
--- a/gtk/gtkmountoperation.c
+++ b/gtk/gtkmountoperation.c
@@ -802,7 +802,7 @@ pid_equal (gconstpointer a,
   pa = *((GPid *) a);
   pb = *((GPid *) b);
 
-  return pb - pa;
+  return GPOINTER_TO_INT(pb) - GPOINTER_TO_INT(pa);
 }
 
 static void
@@ -823,8 +823,8 @@ diff_sorted_arrays (GArray         *array1,
 
   while (n1 < array1->len && n2 < array2->len)
     {
-      order = (*compare) (((gconstpointer) array1->data) + n1 * elem_size,
-                          ((gconstpointer) array2->data) + n2 * elem_size);
+      order = (*compare) (((const char*) array1->data) + n1 * elem_size,
+                          ((const char*) array2->data) + n2 * elem_size);
       if (order < 0)
         {
           g_array_append_val (removed_indices, n1);