swrast: Print out format on unexpected failure in _swrast_ReadPixels.

diff --git a/src/mesa/swrast/s_readpix.c b/src/mesa/swrast/s_readpix.c
index 6ddacab1cb1663993f29135cbd0948f443727c59..5e6356c0d549e14b62915a69c8a419e0f2c89c3a 100644 (file)
--- a/src/mesa/swrast/s_readpix.c
+++ b/src/mesa/swrast/s_readpix.c
@@ -514,7 +514,7 @@ _swrast_ReadPixels( struct gl_context *ctx,
                                    type, pixels, &clippedPacking);
          break;
       default:
-        _mesa_problem(ctx, "unexpected format in _swrast_ReadPixels");
+        _mesa_problem(ctx, "unexpected format 0x%x in _swrast_ReadPixels", format);
          /* don't return yet, clean-up */
    }