Added missing HFONT type.

diff --git a/windows/msgbox.c b/windows/msgbox.c
index 6bda0f5..6c7a5d0 100644
--- a/windows/msgbox.c
+++ b/windows/msgbox.c
@@ -202,7 +202,7 @@
 static LRESULT CALLBACK MSGBOX_DlgProc( HWND hwnd, UINT message,
                                         WPARAM wParam, LPARAM lParam )
 {  
-  static hFont;
+  static HFONT hFont;
   switch(message) {
    case WM_INITDIALOG:
     hFont = MSGBOX_OnInit(hwnd, (LPMSGBOXPARAMSA)lParam);