[glib: 4/10] gio-launch-desktop: Fix a compiler warning

[Philip Withnall <pwithnall src gnome org>]

commit e4e21f20e2539a43d3c01af2443b6d4d141d6593
Author: Simon McVittie <smcv collabora com>
Date:   Thu Jul 14 14:59:54 2022 +0100

    gio-launch-desktop: Fix a compiler warning
    
    Signed-off-by: Simon McVittie <smcv collabora com>

 gio/gio-launch-desktop.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gio/gio-launch-desktop.c b/gio/gio-launch-desktop.c
index c034f76095..405e8c9119 100644
--- a/gio/gio-launch-desktop.c
+++ b/gio/gio-launch-desktop.c
@@ -44,7 +44,7 @@ main (int argc, char *argv[])
     return -1;
 
   r = snprintf (buf, sizeof (buf), "GIO_LAUNCHED_DESKTOP_FILE_PID=%ld", (long) pid);
-  if (r >= sizeof (buf))
+  if (r < 0 || (size_t) r >= sizeof (buf))
     return -1;
 
   putenv (buf);