radv/meta: fix uninitialised stack memory usage.

==10199== Conditional jump or move depends on uninitialised value(s)
==10199==    at 0xA107B13: radv_resume_queries (radv_meta.c:93)
==10199==    by 0xA108097: radv_meta_restore (radv_meta.c:225)
==10199==  Uninitialised value was created by a stack allocation
==10199==    at 0xA1145B2: fill_buffer_shader (radv_meta_buffer.c:171)

saved_state is never memset, so the value should be inited.

Cc: mesa-stable
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/23327>

src/amd/vulkan/meta/radv_meta.c

@@ -127,6 +127,7 @@ radv_meta_save(struct radv_meta_saved_state *state, struct radv_cmd_buffer *cmd_
    assert(flags & (RADV_META_SAVE_GRAPHICS_PIPELINE | RADV_META_SAVE_COMPUTE_PIPELINE));
 
    state->flags = flags;
+   state->active_occlusion_queries = 0;
    state->active_prims_gen_gds_queries = 0;
    state->active_prims_xfb_gds_queries = 0;