[vala-extra-vapis] sdl2-windows: Fix CCode cheader_filename attribute

[Rico Tzschichholz <ricotz src gnome org>]

commit c9496b5aac16995023f61c07997d272836552fe5
Author: Rico Tzschichholz <ricotz ubuntu com>
Date:   Wed Jan 30 21:18:34 2019 +0100

    sdl2-windows: Fix CCode cheader_filename attribute

 sdl2-windows.vapi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/sdl2-windows.vapi b/sdl2-windows.vapi
index d539643..c05e876 100644
--- a/sdl2-windows.vapi
+++ b/sdl2-windows.vapi
@@ -45,7 +45,7 @@ namespace SDL {
                public static void dxgi_get_output_info (int display_index, out int adapter_index, out int 
output_index);
        }// Direct3D9
 
-       [CCode (cname = "SDL_WindowsMessageHook", has_target= true, delegate_target_pos = 0.0, cheader = 
"SDL2/SDL_system.h")]
+       [CCode (cname = "SDL_WindowsMessageHook", has_target= true, delegate_target_pos = 0.0, 
cheader_filename = "SDL2/SDL_system.h")]
        public delegate void WindowsMessageHook (void* hWnd, uint message, uint64 w_param, int64 l_param);
 
        [CCode (cname = "SDL_SetWindowsMessageHook", cheader_filename = "SDL2/SDL_system.h") ]