WriteXKMIndicators: dereference pointer after checking for NULL, not beforeHEADmaster

Found by gcc 14.1:
xkmout.c: In function ‘WriteXKMIndicators’:
xkmout.c:728:8: warning: check of ‘**result.xkb.indicators’ for NULL after
 already dereferencing it [-Wanalyzer-deref-before-check]
  728 |     if (xkb->indicators != NULL) {
      |        ^
[...]
‘WriteXKMIndicators’: events 22-23
  |
  |  727 |     size += xkmPutCARD32(file, xkb->indicators->phys_indicators);
  |      |             ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  |      |             |
  |      |             (22) pointer ‘**result.xkb.indicators’ is dereferenced here
  |  728 |     if (xkb->indicators != NULL) {
  |      |        ~
  |      |        |
  |      |        (23) pointer ‘**result.xkb.indicators’ is checked for NULL
                       here but it was already dereferenced at (22)

Signed-off-by: Alan Coopersmith <alan.coopersmith@oracle.com>
Part-of: <https://gitlab.freedesktop.org/xorg/lib/libxkbfile/-/merge_requests/19>

1 files changed, 4 insertions, 1 deletions

diff --git a/src/xkmout.c b/src/xkmout.c
index 39655be..399f4cc 100644
--- a/src/xkmout.c
+++ b/src/xkmout.c
@@ -724,8 +724,8 @@ WriteXKMIndicators(FILE *file, XkbFileInfo *result, XkmInfo *info)
     dpy = xkb->dpy;
     size += xkmPutCARD8(file, info->num_leds);
     size += xkmPutPadding(file, 3);
-    size += xkmPutCARD32(file, xkb->indicators->phys_indicators);
     if (xkb->indicators != NULL) {
+        size += xkmPutCARD32(file, xkb->indicators->phys_indicators);
         for (i = 0; i < XkbNumIndicators; i++) {
             XkbIndicatorMapPtr map = &xkb->indicators->maps[i];
 
@@ -755,6 +755,9 @@ WriteXKMIndicators(FILE *file, XkbFileInfo *result, XkmInfo *info)
             }
         }
     }
+    else {
+        size += xkmPutCARD32(file, 0);
+    }
     return size;
 }