st/mesa: make rtt_level, face, slice unsigned to silence MSVC warnings

diff --git a/src/mesa/state_tracker/st_cb_fbo.h b/src/mesa/state_tracker/st_cb_fbo.h
index 461dbe9..f335c37 100644 (file)
--- a/src/mesa/state_tracker/st_cb_fbo.h
+++ b/src/mesa/state_tracker/st_cb_fbo.h
@@ -59,7 +59,7 @@ struct st_renderbuffer
    void *data;
 
    struct st_texture_object *rtt;  /**< GL render to texture's texture */
-   int rtt_level, rtt_face, rtt_slice;
+   unsigned rtt_level, rtt_face, rtt_slice;
 };