st/wgl: Fix argument of stw_pixelformat_get_info().

stw_pixelformat_get_info takes zero based index, not a 1 based pixel
format number.

diff --git a/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c b/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c
index 252d07a..a2224fb 100644 (file)
--- a/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c
+++ b/src/gallium/state_trackers/wgl/stw_ext_pbuffer.c
@@ -82,7 +82,7 @@ wglCreatePbufferARB(HDC _hDC,
    HWND hWnd;
    HDC hDC;
 
-   info = stw_pixelformat_get_info(iPixelFormat);
+   info = stw_pixelformat_get_info(iPixelFormat - 1);
    if (!info) {
       SetLastError(ERROR_INVALID_PIXEL_FORMAT);
       return 0;