[glib] docs: Fix typo in gsignal.c documentation comment

[Philip Withnall <pwithnall src gnome org>]

commit d388a00028dba4ad1c0540e86febba0acb0af163
Author: Philip Withnall <withnall endlessm com>
Date:   Thu May 17 13:54:46 2018 +0100

    docs: Fix typo in gsignal.c documentation comment
    
    Spotted by Morten Welinder <mortenw gnome org>.
    
    Signed-off-by: Philip Withnall <withnall endlessm com>
    
    https://bugzilla.gnome.org/show_bug.cgi?id=796186

 gobject/gsignal.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gobject/gsignal.c b/gobject/gsignal.c
index b22dfcca8..76f1dc93c 100644
--- a/gobject/gsignal.c
+++ b/gobject/gsignal.c
@@ -1467,7 +1467,7 @@ g_signal_new (const gchar  *signal_name,
  * Creates a new signal. (This is usually done in the class initializer.)
  *
  * This is a variant of g_signal_new() that takes a C callback instead
- * off a class offset for the signal's class handler. This function
+ * of a class offset for the signal's class handler. This function
  * doesn't need a function pointer exposed in the class structure of
  * an object definition, instead the function pointer is passed
  * directly and can be overriden by derived classes with