Remove trailing whitespace

git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12293 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/drd/drd_thread.c b/drd/drd_thread.c
index 2a6270a..ec5297d 100644
--- a/drd/drd_thread.c
+++ b/drd/drd_thread.c
@@ -552,7 +552,7 @@
       if (DRD_(IsValidDrdThreadId(i)))
 	 DRD_(thread_delete)(i, True);
       tl_assert(!DRD_(IsValidDrdThreadId(i)));
-   }   
+   }
 }
 
 /** Called just before pthread_cancel(). */