[gimp] [libgimp,app] add missing includes for windows

[Michael Schumacher <schumaml src gnome org>]

commit 46f706a40302626d8aaed20f049391d0c4aa94aa
Author: Félix Piédallu <felix piedallu me>
Date:   Fri Aug 23 00:33:31 2019 +0200

    [libgimp,app] add missing includes for windows

 app/core/gimpdatafactory.c     | 1 +
 app/display/gimpdisplayshell.c | 1 +
 libgimp/gimp-debug.c           | 1 +
 3 files changed, 3 insertions(+)
---
diff --git a/app/core/gimpdatafactory.c b/app/core/gimpdatafactory.c
index 41f93aeb76..1338f27300 100644
--- a/app/core/gimpdatafactory.c
+++ b/app/core/gimpdatafactory.c
@@ -22,6 +22,7 @@
 
 #include <gdk-pixbuf/gdk-pixbuf.h>
 #include <gegl.h>
+#include <stdlib.h>
 
 #include "libgimpbase/gimpbase.h"
 #include "libgimpmath/gimpmath.h"
diff --git a/app/display/gimpdisplayshell.c b/app/display/gimpdisplayshell.c
index 3ad034e4d7..31b96a7432 100644
--- a/app/display/gimpdisplayshell.c
+++ b/app/display/gimpdisplayshell.c
@@ -18,6 +18,7 @@
 #include "config.h"
 
 #include <string.h>
+#include <stdlib.h>
 
 #include <gegl.h>
 #include <gtk/gtk.h>
diff --git a/libgimp/gimp-debug.c b/libgimp/gimp-debug.c
index 4c14e6fb69..dd0b688c9e 100644
--- a/libgimp/gimp-debug.c
+++ b/libgimp/gimp-debug.c
@@ -50,6 +50,7 @@
 
 #  include <windows.h>
 #  include <tlhelp32.h>
+#  include <process.h>
 #  undef RGB
 #endif