Change code style of form "if( x )" to "if (x)" for consistency.

diff --git a/server/thread.c b/server/thread.c
index b021dc0..5f4fdee 100644
--- a/server/thread.c
+++ b/server/thread.c
@@ -419,7 +419,7 @@
     struct wait_queue_entry *entry = wait->queues;
 
     /* Suspended threads may not acquire locks */
-    if( thread->process->suspend + thread->suspend > 0 ) return -1;
+    if (thread->process->suspend + thread->suspend > 0) return -1;
 
     assert( wait );
     if (wait->flags & SELECT_ALL)