1 Fix compiler warnings.

     2 

     3 meta-cursor-renderer.c is already fixed upstream in a later release:

     4 https://git.gnome.org/browse/mutter/commit?id=ff312b69585cb0ec9f53483baa47678db8d44306

     5 

     6 Other two files need to be submitted upstream still.

     7 

     8 --- mutter-3.18.0/src/backends/meta-cursor-renderer.c	Sun Oct  4 19:47:56 2015

     9 +++ mutter-3.18.0/src/backends/meta-cursor-renderer.c	Sun Oct  4 19:48:42 2015

    10 @@ -26,6 +26,7 @@

    11  

    12  #include "meta-cursor-renderer.h"

    13  

    14 +#include <math.h> 

    15  #include <meta/meta-backend.h>

    16  #include <meta/util.h>

    17  

    18 --- mutter-3.18.0/src/core/window.c	Mon Sep 21 12:48:51 2015

    19 +++ mutter-3.18.0/src/core/window.c	Tue Jan  5 13:34:16 2016

    20 @@ -3488,7 +3488,7 @@

    21      {

    22        MetaMonitorInfo *info = &window->screen->monitor_infos[i];

    23  

    24 -      if (info->winsys_id == winsys_id)

    25 +      if ((size_t)info->winsys_id == winsys_id)

    26          return info;

    27      }

    28  

    29 @@ -3697,7 +3697,7 @@

    30  

    31    meta_window_update_monitor (window, flags & META_MOVE_RESIZE_USER_ACTION);

    32  

    33 -  if (old_output_winsys_id != window->monitor->winsys_id &&

    34 +  if (old_output_winsys_id != (size_t) window->monitor->winsys_id &&

    35        flags & META_MOVE_RESIZE_MOVE_ACTION && flags & META_MOVE_RESIZE_USER_ACTION)

    36      window->preferred_output_winsys_id = window->monitor->winsys_id;

    37 

    38 --- mutter-3.18.1/src/x11/session.c	Tue Jan  5 13:40:50 2016

    39 +++ mutter-3.18.1/src/x11/session.c	Tue Jan  5 13:41:09 2016

    40 @@ -336,7 +336,7 @@

    41      prop3val.value = &hint;

    42      prop3val.length = 1;

    43  

    44 -    sprintf (pid, "%d", getpid ());

    45 +    sprintf (pid, "%ld", (long)getpid ());

    46      prop4.name = (char *)SmProcessID;

    47      prop4.type = (char *)SmARRAY8;

    48      prop4.num_vals = 1;