wined3d: Implement IWineD3DDevice::EnumDisplayModes.
diff --git a/dlls/wined3d/wined3d_private.h b/dlls/wined3d/wined3d_private.h
index 0553998..afb769c 100644
--- a/dlls/wined3d/wined3d_private.h
+++ b/dlls/wined3d/wined3d_private.h
@@ -1283,4 +1283,7 @@
 
 extern const IWineD3DPaletteVtbl IWineD3DPalette_Vtbl;
 
+/* DirectDraw utility functions */
+extern WINED3DFORMAT pixelformat_for_depth(DWORD depth);
+
 #endif