[java-atk-wrapper] Fix default extents value

[Samuel Thibault <sthibaul src gnome org>]

commit e1cdd17fe27d2c48b73585fdc8293b703b2ab53e
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Mon Aug 19 20:29:45 2019 +0200

    Fix default extents value

 jni/src/jawtext.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
---
diff --git a/jni/src/jawtext.c b/jni/src/jawtext.c
index 7d3dac2..da783a4 100644
--- a/jni/src/jawtext.c
+++ b/jni/src/jawtext.c
@@ -453,7 +453,10 @@ jaw_text_get_range_extents (AtkText *text,
   {
     return;
   }
-  memset(rect, 0, sizeof(*rect));
+  rect->x = -1;
+  rect->y = -1;
+  rect->width = -1;
+  rect->height = -1;
 
   JAW_GET_TEXT(text, );