Removed trailing whitespace.

diff --git a/misc/system.c b/misc/system.c
index 4196aa3..a5d2d2a 100644
--- a/misc/system.c
+++ b/misc/system.c
@@ -192,7 +192,7 @@
  */
 WORD WINAPI SYSTEM_KillSystemTimer( WORD timer )
 {
-    if ( !timer || timer > NB_SYS_TIMERS || !SYS_Timers[timer-1].callback ) 
+    if ( !timer || timer > NB_SYS_TIMERS || !SYS_Timers[timer-1].callback )
         return timer;  /* Error */
     SYS_Timers[timer-1].callback = NULL;
     if (!--SYS_NbTimers) SYSTEM_StopTicks();