emacs-27 3381542: Fix compilation with GTK versions older than 3

[Eli Zaretskii]

branch: emacs-27
commit 338154240e05a06a9fedb806940ef671868b4722
Author: Eli Zaretskii <address@hidden>
Commit: Eli Zaretskii <address@hidden>

    Fix compilation with GTK versions older than 3
    
    * src/xfns.c (x_get_net_workarea): Change a recently moved #ifndef
    so that GTK builds which need this function will compile it.
    Reported by John <address@hidden>.
    
    (cherry picked from commit d36adb544d984b91c70f6194da01344e4b2b6fc9)
---
 src/xfns.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/xfns.c b/src/xfns.c
index b94666d..d0d5d39 100644
--- a/src/xfns.c
+++ b/src/xfns.c
@@ -4572,7 +4572,7 @@ On MS Windows, this just returns nil.  */)
     return Qnil;
 }
 
-#ifndef USE_GTK
+#if !defined USE_GTK || !defined HAVE_GTK3
 
 /* Store the geometry of the workarea on display DPYINFO into *RECT.
    Return false if and only if the workarea information cannot be