Validation, translation and instruction skipping now read memarg flags
through one function, readMemargFlags in module.ts. Flags with bit 6 set
are followed by an explicit memory index, which may be 0; flags of 128 or
more are malformed.
The translator refuses a module (WasmTranslateError) when a memarg,
memory.size, memory.grow, memory.init, memory.copy or memory.fill names a
memory other than 0, and when the operand of local.set, local.tee,
global.set, table.set, a load or a store does not have the type of its
destination. Locals are stored with their declared type.
Chris Tate
b3bcbaaf7c