[glib: 2/10] Fix signedness warning in gio/gkeyfilesettingsbackend.c

[Sebastian Dröge <sdroege src gnome org>]

commit 401ff0661406f14b03226fe566830662ed10ff86
Author: Emmanuel Fleury <emmanuel fleury gmail com>
Date:   Thu Apr 15 11:00:18 2021 +0200

    Fix signedness warning in gio/gkeyfilesettingsbackend.c
    
    gio/gkeyfilesettingsbackend.c: In function ‘convert_path’:
    gio/gkeyfilesettingsbackend.c:155:15: warning: comparison of integer
    expressions of different signedness: ‘gsize’ {aka ‘long unsigned int’}
    and ‘gint’ {aka ‘int’}
      155 |   if (key_len < kfsb->prefix_len ||
          |               ^

 gio/gkeyfilesettingsbackend.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)
---
diff --git a/gio/gkeyfilesettingsbackend.c b/gio/gkeyfilesettingsbackend.c
index 094be3f91..9319491d5 100644
--- a/gio/gkeyfilesettingsbackend.c
+++ b/gio/gkeyfilesettingsbackend.c
@@ -66,9 +66,9 @@ typedef struct
   GHashTable        *system_locks; /* Used as a set, owning the strings it contains */
 
   gchar             *prefix;
-  gint               prefix_len;
+  gsize              prefix_len;
   gchar             *root_group;
-  gint               root_group_len;
+  gsize              root_group_len;
 
   GFile             *file;
   GFileMonitor      *file_monitor;
@@ -173,7 +173,9 @@ convert_path (GKeyfileSettingsBackend  *kfsb,
       /* if a root_group was specified, make sure the user hasn't given
        * a path that ghosts that group name
        */
-      if (last_slash != NULL && (last_slash - key) == kfsb->root_group_len && memcmp (key, kfsb->root_group, 
last_slash - key) == 0)
+      if (last_slash != NULL && last_slash - key >= 0 &&
+          (gsize) (last_slash - key) == kfsb->root_group_len &&
+          memcmp (key, kfsb->root_group, last_slash - key) == 0)
         return FALSE;
     }
   else