Remove unnecessary WNDPROC casts.
diff --git a/dlls/comctl32/header.c b/dlls/comctl32/header.c
index cb4ec0b..743725c 100644
--- a/dlls/comctl32/header.c
+++ b/dlls/comctl32/header.c
@@ -1842,7 +1842,7 @@
ZeroMemory (&wndClass, sizeof(WNDCLASSA));
wndClass.style = CS_GLOBALCLASS | CS_DBLCLKS;
- wndClass.lpfnWndProc = (WNDPROC)HEADER_WindowProc;
+ wndClass.lpfnWndProc = HEADER_WindowProc;
wndClass.cbClsExtra = 0;
wndClass.cbWndExtra = sizeof(HEADER_INFO *);
wndClass.hCursor = LoadCursorA (0, (LPSTR)IDC_ARROW);