[wasm] Fix bounds check for zero initial memory.

src/arm/assembler-arm.cc

Index: src/arm/assembler-arm.cc
diff --git a/src/arm/assembler-arm.cc b/src/arm/assembler-arm.cc
index ee02027610dc76fe216a1f64c4d2623570da1720..26cf30967230f81968c79f1a17d53104414fba9d 100644
--- a/src/arm/assembler-arm.cc
+++ b/src/arm/assembler-arm.cc
@@ -351,6 +351,12 @@ Address RelocInfo::wasm_global_reference() {
   return Assembler::target_address_at(pc_, host_);
 }
 
+uint8_t RelocInfo::wasm_memtype_size_reference() {
+  DCHECK(IsWasmMemtypeSizeReference(rmode_));
+  return static_cast<uint8_t>(
+      reinterpret_cast<intptr_t>(Assembler::target_address_at(pc_, host_)));
+}
+
 void RelocInfo::unchecked_update_wasm_memory_reference(
     Address address, ICacheFlushMode flush_mode) {
   Assembler::set_target_address_at(isolate_, pc_, host_, address, flush_mode);