Wasm: call RhpAssignRef for stfld and stelem

src/ILCompiler.WebAssembly/src/CodeGen/ILToWebAssemblyImporter.cs

@@ -1172,7 +1172,7 @@ private void StoreStruct(LLVMValueRef address, LLVMValueRef llvmValue, TypeDesc
             }
             if (!childStruct)
             {
-                _builder.BuildStore(llvmValue, typedStoreLocation); // just copy all the fields again for simplicity, if all the fields where set using RhpAssignRef then a possible optimisation would be to skip this line
+                _builder.BuildStore(llvmValue, typedStoreLocation); // just copy all the fields again for simplicity, if all the fields were set using RhpAssignRef then a possible optimisation would be to skip this line
             }
         }