Changed xxx(VOID) to xxx(void).

diff --git a/dlls/comctl32/header.c b/dlls/comctl32/header.c
index a56bd07..23b4182 100644
--- a/dlls/comctl32/header.c
+++ b/dlls/comctl32/header.c
@@ -1551,7 +1551,7 @@
 
 
 VOID
-HEADER_Register (VOID)
+HEADER_Register (void)
 {
     WNDCLASSA wndClass;
 
@@ -1570,7 +1570,7 @@
 
 
 VOID
-HEADER_Unregister (VOID)
+HEADER_Unregister (void)
 {
     if (GlobalFindAtomA (WC_HEADERA))
 	UnregisterClassA (WC_HEADERA, (HINSTANCE)NULL);