message: Fix clangtidy error in DedupBlocks.cpp
  Summary: `x.size() > 0` => `!x.empty()`
diff: @@ -916,7 +916,7 @@ class DedupBlocksImpl {
  TRACE(DEDUP_BLOCKS, 5, "[dedup blocks] found init invocation: %s",
  SHOW(insn));
  auto& defs = (*live_ranges->use_def_chains)[live_range::Use{insn, 0}];
  - always_assert(defs.size() > 0);
  + always_assert(!defs.empty());
  if (defs.size() > 1) {
  // should never happen, but we are not going to fight that here
  TRACE(DEDUP_BLOCKS, 5, "[dedup blocks] defs.size() = %zu",
  