[glib] gsocketlistener: Fix a typo in the documentation

[Philip Withnall <pwithnall src gnome org>]

commit dd815c3d2bc07159f7174f3e253263a131c14ecd
Author: Philip Withnall <withnall endlessm com>
Date:   Tue Mar 13 14:00:49 2018 +0000

    gsocketlistener: Fix a typo in the documentation
    
    Mismatched singular/plural.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=794207

 gio/gsocketlistener.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gio/gsocketlistener.c b/gio/gsocketlistener.c
index df6b71b0d..7e6376bf3 100644
--- a/gio/gsocketlistener.c
+++ b/gio/gsocketlistener.c
@@ -50,8 +50,8 @@
  * socket, either sync or async.
  *
  * If you want to implement a network server, also look at #GSocketService
- * and #GThreadedSocketService which are subclass of #GSocketListener
- * that makes this even easier.
+ * and #GThreadedSocketService which are subclasses of #GSocketListener
+ * that make this even easier.
  *
  * Since: 2.22
  */