[gimp/gimp-2-10] app: fix cast bug.

[Jehan <jehanp src gnome org>]

commit 2335d5590d3189c4456dad57721dafd19899c36d
Author: Jehan <jehan girinstud io>
Date:   Mon Apr 20 01:21:22 2020 +0200

    app: fix cast bug.
    
    When building (at least on 32-bit), fixes this warning:
    > app/widgets/gimpdashboard.c:3840:58: warning: cast to pointer from integer of different size 
[-Wint-to-pointer-cast]
    
    Unsigned long long is specified in the C99 standard to be at least
    64-bit. So it's normal that the compiler complains, as a cast from
    unsigned long long to a pointer has chances to go very wrong.
    Yet gimp_backtrace_get_frame_address() actually returns a guintptr which
    is type-compatible with gpointer so let's not give the compiler false
    information and just use this type. Then cast it to unsigned long long
    just for printing to dashboard log.
    
    (cherry picked from commit 8caef4ea0baa8eda595eece70075178c9aecc94a)

 app/widgets/gimpdashboard.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/widgets/gimpdashboard.c b/app/widgets/gimpdashboard.c
index ca4125578d..f8aeaa27cb 100644
--- a/app/widgets/gimpdashboard.c
+++ b/app/widgets/gimpdashboard.c
@@ -3858,14 +3858,14 @@ gimp_dashboard_log_sample (GimpDashboard *dashboard,
 
               for (frame = n_head; frame < n_frames - n_tail; frame++)
                 {
-                  unsigned long long      address;
+                  guintptr address;
 
                   address = gimp_backtrace_get_frame_address (backtrace,
                                                               thread, frame);
 
                   gimp_dashboard_log_printf (dashboard,
                                              "<frame address=\"0x%llx\" />\n",
-                                             address);
+                                             (unsigned long long) address);
 
                   g_hash_table_add (priv->log_addresses, (gpointer) address);
                 }