message: mini_heap: slightly better debug messages
diff: @@ -171,7 +171,7 @@ public:
  }
  inline void freeOff(size_t off) {
  - d_assert(_bitmap.isSet(off));
  + d_assert_msg(_bitmap.isSet(off), "MiniHeap(%p) expected bit %zu to be set (svOff:%zu)", this, off, svOffset());
  _bitmap.unset(off);
  }
  @@ -255,6 +255,7 @@ public:
  }
  inline void setSvOffset(uint8_t off) {
  + // debug("MiniHeap(%p) SET svOff:%zu)", this, off);
  _flags.setSvOffset(off);
  }
  