Use GetTimerMS() instead of time() with srand.

This is more portable and avoids generating the same random numbers
for a whole second (and on MinGW for some unexplainable reason for
almost 10 seconds).

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@27353 b3059339-0415-0410-9bf9-f77b7e298cf2

mplayer.c

@@ -2556,9 +2556,8 @@ int i;
 
 int gui_no_filename=0;
 
-  srand((int) time(NULL)); 
-
   InitTimer();
+  srand(GetTimerMS());
   
   mp_msg_init();