fix segfault on 64-bit platforms.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/gfx.h b/src/gfx.h
index 878c5db..427f232 100644
--- a/src/gfx.h
+++ b/src/gfx.h
@@ -73,7 +73,7 @@ typedef struct
    uint32* ScreenColorsPre;
    uint32 PaletteMask;
    uint32 PaletteShift;
-   uint32 DepthDelta;
+   intptr_t DepthDelta;
    uint8  Z1;
    uint8  Z2;
    uint32 FixedColour;