aux/pb: more correctly check number of reclaims

the increment needs to happen before the comparison here

Fixes: 3d6c8829f5 ("aux/pb: add a tolerance for reclaim failure")

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13388>

src/gallium/auxiliary/pipebuffer/pb_slab.c

@@ -89,7 +89,7 @@ pb_slabs_reclaim_locked(struct pb_slabs *slabs)
        * the driver should not walk the entire list, as this is likely to
        * result in zero reclaims if the first few entries fail to reclaim
        */
-      } else if (num_failed_reclaims++ > MAX_FAILED_RECLAIMS) {
+      } else if (++num_failed_reclaims >= MAX_FAILED_RECLAIMS) {
          break;
       }
    }