gallium/u_blitter: add return to fix the build

diff --git a/src/gallium/auxiliary/util/u_blitter.h b/src/gallium/auxiliary/util/u_blitter.h
index 9e3fa55e648b4962aaaaef2f2589f66d8f60a187..a7c931c01cad0ee81530d0399e0daaa8ab9d2160 100644 (file)
--- a/src/gallium/auxiliary/util/u_blitter.h
+++ b/src/gallium/auxiliary/util/u_blitter.h
@@ -624,6 +624,7 @@ util_blitter_get_color_format_for_zs(enum pipe_format format)
    default:
       assert(0);
    }
+   return PIPE_FORMAT_NONE;
 }
 
 #ifdef __cplusplus