Expose a lower bound of malloc'd memory via heap statistics

src/wasm/module-decoder.cc

Index: src/wasm/module-decoder.cc
diff --git a/src/wasm/module-decoder.cc b/src/wasm/module-decoder.cc
index 558d17c5a6e1117e8cf4f9c37f52faaef43e965d..3e85a1b53cefd2e8ebbecf75cfa9a18e94b3f14e 100644
--- a/src/wasm/module-decoder.cc
+++ b/src/wasm/module-decoder.cc
@@ -575,7 +575,7 @@ class ModuleDecoder : public Decoder {
     FunctionBody body = {menv, function->sig, start_,
                          start_ + function->code_start_offset,
                          start_ + function->code_end_offset};
-    TreeResult result = VerifyWasmCode(body);
+    TreeResult result = VerifyWasmCode(module_zone->allocator(), body);
     if (result.failed()) {
       // Wrap the error message from the function decoder.
       std::ostringstream str;