user32: Declare some functions static.

dlls/user32/comm16.c

@@ -361,7 +361,7 @@ static void comm_waitwrite(struct DosDeviceStruct *ptr)
 /*****************************************************************************
  *	COMM16_DCBtoDCB16	(Internal)
  */
-INT16 COMM16_DCBtoDCB16(LPDCB lpdcb, LPDCB16 lpdcb16)
+static INT16 COMM16_DCBtoDCB16(LPDCB lpdcb, LPDCB16 lpdcb16)
 {
 	if(lpdcb->BaudRate<0x10000)
 		lpdcb16->BaudRate = lpdcb->BaudRate;

dlls/user32/menu.c

@@ -440,7 +440,7 @@ static HMENU MENU_CopySysPopup(void)
  * However, the real system menu handle is sometimes seen in the
  * WM_MENUSELECT parameters (and Word 6 likes it this way).
  */
-HMENU MENU_GetSysMenu( HWND hWnd, HMENU hPopupMenu )
+static HMENU MENU_GetSysMenu( HWND hWnd, HMENU hPopupMenu )
 {
     HMENU hMenu;