[java-atk-wrapper] Use -1 for invalid extents values rather than 0

[Samuel Thibault <sthibaul src gnome org>]

commit 2fdfc78dacd8a74b6ffcd79b192a8e1431cf60da
Author: Samuel Thibault <samuel thibault ens-lyon org>
Date:   Thu Aug 15 11:52:28 2019 +0200

    Use -1 for invalid extents values rather than 0
    
    because (0,0) is a valid position and Orca would happily use it

 jni/src/jawcomponent.c | 8 ++++----
 jni/src/jawimage.c     | 8 ++++----
 jni/src/jawtext.c      | 8 ++++----
 3 files changed, 12 insertions(+), 12 deletions(-)
---
diff --git a/jni/src/jawcomponent.c b/jni/src/jawcomponent.c
index c3ae34f..c9d6cab 100644
--- a/jni/src/jawcomponent.c
+++ b/jni/src/jawcomponent.c
@@ -180,10 +180,10 @@ jaw_component_get_extents (AtkComponent *component,
   if (x == NULL || y == NULL || width == NULL || height == NULL)
     return;
 
-  (*x) = 0;
-  (*y) = 0;
-  (*width) = 0;
-  (*height) = 0;
+  (*x) = -1;
+  (*y) = -1;
+  (*width) = -1;
+  (*height) = -1;
 
   if (component == NULL)
     return;
diff --git a/jni/src/jawimage.c b/jni/src/jawimage.c
index 833fb11..c0de23b 100644
--- a/jni/src/jawimage.c
+++ b/jni/src/jawimage.c
@@ -92,8 +92,8 @@ jaw_image_get_image_position (AtkImage *image,
                gint *x, gint *y, AtkCoordType coord_type)
 {
        JAW_DEBUG_C("%p, %p, %p, %d", image, x, y, coord_type);
-       (*x) = 0;
-       (*y) = 0;
+       (*x) = -1;
+       (*y) = -1;
        JAW_GET_IMAGE(image, );
 
        jclass classAtkImage = (*jniEnv)->FindClass(jniEnv, "org/GNOME/Accessibility/AtkImage");
@@ -142,8 +142,8 @@ static void
 jaw_image_get_image_size (AtkImage *image, gint *width, gint *height)
 {
        JAW_DEBUG_C("%p, %p, %p", image, width, height);
-       (*width) = 0;
-       (*height) = 0;
+       (*width) = -1;
+       (*height) = -1;
        JAW_GET_IMAGE(image, );
 
        jclass classAtkImage = (*jniEnv)->FindClass(jniEnv, "org/GNOME/Accessibility/AtkImage");
diff --git a/jni/src/jawtext.c b/jni/src/jawtext.c
index 4a47d00..7d3dac2 100644
--- a/jni/src/jawtext.c
+++ b/jni/src/jawtext.c
@@ -373,10 +373,10 @@ jaw_text_get_character_extents (AtkText *text,
                                 AtkCoordType coords)
 {
   JAW_DEBUG_C("%p, %d, %p, %p, %p, %p, %d", text, offset, x, y, width, height, coords);
-  *x = 0;
-  *y = 0;
-  *width = 0;
-  *height = 0;
+  *x = -1;
+  *y = -1;
+  *width = -1;
+  *height = -1;
   JAW_GET_TEXT(text, );
 
   jclass classAtkText = (*jniEnv)->FindClass(jniEnv,