[at-spi2-atk: 1/2] tests: fix child_pid reference

[Mike Gorse <mgorse src gnome org>]

commit f200f2f37cf732d96d3b7e5de537840c570516fa
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Tue Aug 27 13:07:26 2019 +0200

    tests: fix child_pid reference
    
    180f91479e27 ("tests: Replace common variable with usual external
    variable") fixed the variable declaration, but there was no definition
    either. This adds it.

 tests/atk_test_util.c | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/tests/atk_test_util.c b/tests/atk_test_util.c
index c932df8..7a73c2b 100644
--- a/tests/atk_test_util.c
+++ b/tests/atk_test_util.c
@@ -23,6 +23,8 @@
 #include <signal.h>
 #include "atk_test_util.h"
 
+pid_t child_pid;
+
 static void assert_clean_exit (int sig)
 {
   kill (child_pid, SIGTERM);