[glib] mainloop test: fix a small typo

[Ryan Lortie <ryanl src gnome org>]

commit 42c2c4f67da404330960ca307393ad71e68c167d
Author: Ryan Lortie <desrt desrt ca>
Date:   Tue Jan 15 15:22:35 2013 -0500

    mainloop test: fix a small typo
    
    This g_assert() could never possibly fail, as it was.

 glib/tests/mainloop.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/glib/tests/mainloop.c b/glib/tests/mainloop.c
index 66871a3..e66216d 100644
--- a/glib/tests/mainloop.c
+++ b/glib/tests/mainloop.c
@@ -912,7 +912,7 @@ write_bytes (gint         fd,
     return FALSE;
 
   /* Detect if we run before we should */
-  g_assert (to_write >= 0);
+  g_assert (*to_write >= 0);
 
   limit = MIN (*to_write, sizeof zeros);
   *to_write -= write (fd, zeros, limit);