[gimp/gimp-2-10] plug-ins: fix Windows build in UCRT environment

[Jacob Boerema <jboerema src gnome org>]

commit 08ba94c652de75e746d3d4bf7bc44a4a48dbb321
Author: Jacob Boerema <jgboerema gmail com>
Date:   Tue May 17 16:58:22 2022 -0400

    plug-ins: fix Windows build in UCRT environment
    
    The UCRT environment is a successor to the MINGW environment on Windows
    with a more modern C runtime library.
    Building under UCRT we get this error:
    ../../gimp/plug-ins/file-raw/file-darktable.c:420:7: error:
     function '__p__environ' is initialized like a variable"
    
    To fix this we use the relevant part of patch 6 from:
    https://github.com/msys2/MINGW-packages/tree/master/mingw-w64-gimp
    
    (cherry picked from commit ef817dc452acefb86277cad54cbc10c5415a0620)

 plug-ins/file-raw/file-darktable.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)
---
diff --git a/plug-ins/file-raw/file-darktable.c b/plug-ins/file-raw/file-darktable.c
index 6c5f5f6265..b5897c8e5c 100644
--- a/plug-ins/file-raw/file-darktable.c
+++ b/plug-ins/file-raw/file-darktable.c
@@ -401,7 +401,7 @@ load_image (const gchar  *filename,
 
   if (debug_prints)
     {
-      gchar **environ = g_get_environ ();
+      gchar **environ_ = g_get_environ ();
       gint    i;
 
       g_printf ("[%s] trying to call\n", __FILE__);
@@ -410,9 +410,9 @@ load_image (const gchar  *filename,
       g_printf ("\n");
 
       g_printf ("## Environment ##\n");
-      for (i = 0; environ[i]; i++)
-        g_printf ("- %s\n", environ[i]);
-      g_strfreev (environ) ;
+      for (i = 0; environ_[i]; i++)
+        g_printf ("- %s\n", environ_[i]);
+      g_strfreev (environ_) ;
     }
 
   if (g_spawn_sync (NULL,