winedos: Remove static storage class from a variable

[Andrew Talbot]

vga_hwnd is also declared (extern) in soundblaster.c, though its intended use there is currently commented
out as a FIXME.

-- Andy.
---
Changelog:
    winedos: Remove static storage class from a variable.

diff --git a/dlls/winedos/vga.c b/dlls/winedos/vga.c
index 26618a2..f59791e 100644
--- a/dlls/winedos/vga.c
+++ b/dlls/winedos/vga.c
@@ -156,7 +156,7 @@ static DirectDrawCreateProc pDirectDrawCreate;
 
 static void CALLBACK VGA_Poll( LPVOID arg, DWORD low, DWORD high );
 
-static HWND vga_hwnd = NULL;
+HWND vga_hwnd = NULL;
 
 /*
  * For simplicity, I'm creating a second palette.